Terminal Apparatus and Base Station Apparatus

The present invention relates to a terminal apparatus and a base station apparatus.

This application claims priority to JP 2023-077660 filed on May 10, 2023, the contents of which are incorporated herein by reference.

rd In the 3Generation Partnership Project (3GPP), a radio access method and a radio network for cellular mobile communications (hereinafter also referred to as “Long Term Evolution (LTE)” or “Evolved Universal Terrestrial Radio Access (EUTRA)”) have been studied. In LTE, a base station apparatus is also referred to as an evolved NodeB (eNodeB) and a terminal apparatus is also referred to as a User Equipment (UE). LTE is a cellular communication system in which multiple areas covered by base station apparatuses are arranged in a form of cells. A single base station apparatus may manage multiple serving cells.

The 3GPP has been studying a next generation standard (New Radio or NR) (NPL 1) to make a proposal for International Mobile Telecommunication (IMT)-2020, a standard for a next generation mobile communication system developed by the International Telecommunication Union (ITU). NR is to satisfy requirements for three scenarios including enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliable and Low Latency Communication (URLLC) in a single technology framework.

In the 3GPP, extension of services supported by NR has been studied (NPL 2).

NPL 1: “New SID proposal: Study on New Radio Access Technology”, RP-160671, NTT docomo, 3GPP TSG RAN Meeting #71, Goteborg, Sweden, 7th to 10th March, 2016. NPL 2: “Release 17 package for RAN”, RP-193216, RAN chairman, RAN1 chairman, RAN2 chairman, RAN3 chairman, 3GPP TSG RAN Meeting #86, Sitges, Spain, 9th to 12th December, 2019 NPL 3: “Release 18 package summary”, RP-213469, RAN chairman, RAN1 chairman, RAN2 chairman, RAN3 chairman, 3GPP TSG RAN Meeting #94-e, 6th to 17th December, 2021

The present invention provides a terminal apparatus that efficiently performs communication, a communication method used for the terminal apparatus, a base station apparatus that efficiently performs communication, and a communication method used for the base station apparatus.

(1) A first aspect of the present invention is a terminal apparatus including a transmitter configured to transmit an SRS in an SRS resource, and a receiver configured to receive a PDCCH to which DCI is mapped, wherein the DCI indicates the SRS resource, the number of SRS ports for the SRS is eight, the eight SRS ports are mapped across S OFDM symbols, transmission power is determined for the SRS resource, and a linear value of the transmission power is equally split for 8/S of the SRS ports.

(2) A second aspect of the present invention is a terminal apparatus including a transmitter configured to transmit an SRS resource, and a receiver configured to receive a PDCCH to which DCI is mapped, wherein the DCI indicates the SRS resource, the number of SRS ports for the SRS resource is eight, the eight SRS ports are mapped across S OFDM symbols, transmission power is determined for the SRS resource, the transmission power is determined or calculated for every 8/S the SRS ports, and a linear value of the transmission power is equally split for 8/S of the SRS ports.

(3) A third aspect of the present invention is a base station apparatus including a receiver configured to receive an SRS in an SRS resource; and a transmitter configured to transmit a PDCCH to which DCI is mapped, wherein the DCI indicates the SRS resource, the number of SRS ports for the SRS resource is eight, the eight SRS ports are mapped across S OFDM symbols, transmission power is determined for the SRS, and a linear value of the transmission power is equally split for 8/S of the SRS ports.

According to the present invention, the terminal apparatus can efficiently perform communication. In addition, the base station apparatus can efficiently perform communication.

An embodiment of the present invention will be described below. floor(C) may be a floor function for a real number C. For example, floor(C) may be a function that outputs a maximum integer in a range of not exceeding the real number C. ceil(D) may be a ceiling function for a real number D. For example, ceil(D) may be a function that outputs a minimum integer in a range of not falling below the real number D. mod(E, F) may be a function that outputs a remainder obtained by dividing E by F. mod(E, F) may be a function that outputs a value corresponding to the remainder obtained by dividing E by F. exp(G)=e{circumflex over ( )}G. Here, e is a Napier's constant. H{circumflex over ( )}I represents H to the power of I. max(J, K) is a function that outputs a maximum value out of J and K. Here, in a case that J and K are equal, max(J, K) is a function that outputs J or K. min(L, M) is a function that outputs a maximum value out of L and M. Here, in a case that L and M are equal, min(L, M) is a function that outputs L or M. round(N) is a function that outputs an integer value of a value closest to N. “.” represents multiplication.

In the radio communication system according to an aspect of the present embodiment, at least Orthogonal Frequency Division Multiplex (OFDM) is used. The OFDM symbol is a time domain unit of the OFDM. The OFDM symbol includes at least one or multiple subcarriers. The OFDM symbol is converted into a time-continuous signal in baseband signal generation. In downlink, at least Cyclic Prefix-Orthogonal Frequency Division Multiplex (CP-OFDM) is used.

In uplink, either CP-OFDM or Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplex (DFT-s-OFDM) is used. DFT-s-OFDM may be given by applying Transform precoding to the CP-OFDM.

The OFDM symbol may be a term including a CP added to the OFDM symbol. That is, a certain OFDM symbol may include the certain OFDM symbol and the CP added to the certain OFDM symbol.

1 FIG. 1 FIG. 1 1 3 1 1 1 is a conceptual diagram of a radio communication system according to an aspect of the present embodiment. In, the radio communication system includes at least terminal apparatusesA toC and a base station apparatus(Base station #3 (BS #3)). Hereinafter, the terminal apparatusesA toC are also referred to as a terminal apparatus(User Equipment #1 (UE #1)).

3 3 The base station apparatusmay include one or multiple transmission apparatuses (or transmission points, transmission and/or reception apparatuses, transmission and/or reception points). In a case that the base station apparatusincludes multiple transmission apparatuses, the multiple transmission apparatuses may be arranged at different positions.

3 The base station apparatusmay provide one or multiple serving cells. Each serving cell may be defined as a set of resources used for radio communication. In addition, the serving cell is also referred to as a cell.

The serving cell may include one or both of one downlink component carrier (downlink carrier) and one uplink component carrier (uplink carrier). The serving cell may include either or both of two or more downlink component carriers, and/or two or more uplink component carriers. The downlink component carrier and the uplink component carrier are also collectively referred to as a component carrier (carrier).

1 For example, for each component carrier, one resource grid may be given. In addition, for each set of one component carrier and a certain subcarrier spacing configuration μ, one resource grid may be given. Here, the subcarrier spacing configuration μs also referred to as numerology. For example, for a set of a certain antenna port p, a certain subcarrier spacing configuration μ, and a certain transmission direction x, one resource grid may be given.

size, μ RB start, μ start, μ grid, x sc grid, x grid, x The resource grid includes NNsubcarriers. Here, the resource grid starts from a common resource block N. In addition, the common resource block Nis also referred to as a reference point of the resource grid.

subframe, μ symb The resource grid includes NOFDM symbols.

The subscript x added to the parameter associated with the resource grid indicates the transmission direction. For example, the subscript x may be used to indicate either of downlink or uplink.

size, μ start, μgrid, x grid, x Nis an offset configuration indicated by a parameter provided by the RRC layer (e.g., parameter CarrierBandwidth). Nis a band configuration indicated by a parameter provided by the RRC layer (e.g., parameter, OffsetToCarrier). The offset configuration and the band configuration are configurations used for configuring an SCS-specific carrier.

μ· The SubCarrier Spacing (SCS) Δf for a certain subcarrier spacing configuration μ may be Δf satisfying Δf=215 kHz. Here, the subcarrier spacing configuration μ may indicate one of 0, 1, 2, 3, or 4.

2 FIG. 2 FIG.A 2 FIG.B slot slot frame, μ subframe, μ slot frame, μ subframe, μ symb 1 symb slot slot 1 symb slot slot is an example illustrating a relationship between the subcarrier spacing configuration μ, the number of OFDM symbols per slot N, and a cyclic Prefix (CP) configuration according to an aspect of the present embodiment. In, for example, in a case that the subcarrier spacing configuration μs 2 and the CP configuration is a normal cyclic prefix (normal CP), N=14, N=40, and N=4. In addition, in, for example, in a case that the subcarrier spacing configuration μs 2 and the CP configuration is an extended cyclic prefix (extended CP), N=12, N=40, and N=4.

c c c max f max f max f ref f, ref ref f The time unit Tmay be used to represent the length of the time domain. The time unit Tis T=1/(Δf−N). Δf=480 kHz. N=4096. A constant κ is κ=Δf·N/(ΔfN)=64. Δfis 15 kHz. N, ref is 2048.

f f max f s sf max f s symb symb slot subframe, μ slot subframe, μ Transmission of a signal in the downlink and/or transmission of a signal in the uplink may be organized into a radio frame (system frame, frame) having the length T. T=(ΔfN/100)·T=10 ms. The radio frame includes 10 subframes. The length Tof the subframe is (ΔfN/1000)·T=1 ms. The number of OFDM symbols per subframe is N=NN.

The OFDM symbol is a time domain unit of one communication scheme. For example, the OFDM symbol may be a time domain unit of CP-OFDM. In addition, the OFDM symbol may be a time domain unit of DFT-s-OFDM.

slot slot slot symb symb symb The slot may include multiple OFDM symbols. For example, Ncontinuous OFDM symbols may constitute one slot. For example, in a normal CP configuration, Nmay be 14. In addition, in an extended CP configuration, Nmay be 12.

μ subframe, μ μ frame, μ s slot s, f slot For a certain subcarrier spacing configuration μ, the number and index of a slot included in the subframe may be given. For example, slot indices nmay be given in ascending order in the subframe with integer values within a range of 0 to N−1. For the subcarrier spacing configuration μ, the number and index of a slot included in the radio frame may be given. In addition, slot indices nmay be given in ascending order in the radio frame with integer values within a range of 0 to N−1.

3 FIG. 3 FIG. 3 FIG. 3 FIG. 1 2 1 2 1 2 300 is a diagram illustrating an example of a configuration method of a resource grid according to an aspect of the present embodiment. The horizontal axis ofrepresents a frequency domain.illustrates a configuration example of a resource grid of a subcarrier spacing μin a component carrier, and a configuration example of a resource grid of a subcarrier spacing μin the certain component carrier. As described above, for a certain component carrier, one or multiple subcarrier spacings may be configured. In, it is assumed that μ=μ−1, but various aspects of the present embodiment are not limited to the condition of μ=μ−1.

300 The component carrieris a band having a prescribed width in the frequency domain.

3000 3000 3100 1 A pointis an identifier for identifying a certain subcarrier. The pointis also referred to as a point A. A common resource block (CRB) setis a set of common resource blocks for the configuration of the subcarrier spacing μ.

3100 3100 3000 3100 3100 3100 3 FIG. In the common resource block set, a common resource block (solid black block in the common resource block setin) including the pointis also referred to as a reference point of the common resource block set. The reference point of the common resource block setmay be a common resource block having an index 0 in the common resource block set.

3011 3100 3001 3011 3001 3001 1 grid1, x size, μ An offsetis an offset from the reference point of the common resource block setto a reference point of a resource grid. The offsetis represented by the number of common resource blocks for the configuration of the subcarrier spacing μ. The resource gridincludes Ncommon resource blocks starting from the reference point of the resource grid.

3013 3001 3003 stat, μ BWP, i1 An offsetis an offset from the reference point of the resource gridto a reference point (N) of a bandwidth part (BWP)having an index i1.

3200 2 A common resource block setis a set of common resource blocks for the configuration of the subcarrier spacing μ.

3200 3200 3000 3200 3200 3200 3 FIG. In the common resource block set, a common resource block (solid black block in the common resource block setin) including the pointis also referred to as a reference point of the common resource block set. The reference point of the common resource block setmay be a common resource block having an index 0 in the common resource block set.

3012 3200 3002 3012 3002 3002 2 grid2, x size, μ An offsetis an offset from the reference point of the common resource block setto a reference point of a resource grid. The offsetis represented by the number of common resource blocks for the subcarrier spacing μ. The resource gridincludes Ncommon resource blocks starting from the reference point of the resource grid.

3014 3002 3004 start, μ BWP, i2 An offsetis an offset from the reference point of the resource gridto a reference point (N) of a BWPhaving an index i2.

4 FIG. 4 FIG. 3001 3001 symb sc grid1, x sc symb sc sym size, μ RB subframe, μ is a diagram illustrating a configuration example of the resource gridaccording to an aspect of the present embodiment. In the resource grid of, the horizontal axis corresponds to an OFDM symbol index l, and the vertical axis corresponds to a subcarrier index k. The resource gridincludes NNsubcarriers, and NOFDM symbols. In the resource grid, a resource identified by the subcarrier index kand the OFDM symbol index lis also referred to as a resource element (RE).

RB RB sc sc The resource block (RB) includes Ncontinuous subcarriers. The resource block is a general term for a common resource block, a physical resource block (PRB), and a virtual resource block (VRB). Here, Nis 12.

A resource block unit is a set of resources corresponding to one OFDM symbol in one resource block. That is, one resource block unit includes 12 resource elements corresponding to one OFDM symbol in one resource block.

3000 3000 CRB CRB sc sc sc RB The common resource blocks for the configuration of a certain subcarrier spacing μ are assigned indices (indexing) in ascending order from 0 in the frequency domain in a certain common resource block set. The common resource block having the index 0 for the configuration of a certain subcarrier spacing μ includes (collides with or matches) the point. An index nμof the common resource block for the configuration of the certain subcarrier spacing μsatisfies the relationship of nμ=ceil(k/N). Here, a subcarrier with k=0 is a subcarrier having the same center frequency as the center frequency of a subcarrier corresponding to the point.

CRB PRB BWP, i BWP, i μ start, μ start, μ Physical resource blocks for the configuration of the certain subcarrier spacing μ are assigned indices in ascending order from 0 in the frequency domain in a certain BWP. An index n PRB of the physical resource block for the configuration of the certain subcarrier spacing cμ satisfies the relationship of nμ=n+N. Here, Nindicates a reference point of the BWP having an index i.

size, μ start, μ BWP, i BWP, i The BWP is defined as a subset of common resource blocks included in the resource grid. The BWP includes Ncommon resource blocks starting from the reference point Nof the BWP. A BWP configured for a downlink carrier is also referred to as a downlink BWP. A BWP configured for an uplink component carrier is also referred to as an uplink BWP.

An antenna port may be defined such that the channel over which a symbol on the antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed. For example, the channel may correspond to a physical channel. In addition, the symbol may correspond to an OFDM symbol. In addition, the symbol may correspond to a resource block unit. In addition, the symbol may correspond to a resource element.

1 The fact that a large scale property of a channel over which a symbol on one antenna port is conveyed can be inferred from a channel over which a symbol on another antenna port is conveyed is referred to as the two antenna ports being quasi co-located (QCL). Here, the large scale property may include at least long term property of a channel. The large scale property may include at least a part or all of delay spread, Doppler spread, Doppler shift, an average gain, an average delay, and a beam parameter (spatial Rx parameters). The fact that the first antenna port and the second antenna port are QCLed with respect to a beam parameter may mean that a reception beam assumed by a reception side for the first antenna port and a reception beam assumed by the reception unit side for the second antenna port are the same (or the reception beams correspond to each other). The fact that the first antenna port and the second antenna port are QCLed with respect to a beam parameter may mean that a transmission beam assumed by a reception side for the first antenna port and a transmission beam assumed by the reception side for the second antenna port are the same (or the transmission beams correspond to each other). In a case that the large scale property of a channel over which a symbol on one antenna port is conveyed can be inferred from a channel over which a symbol on another antenna port is conveyed, the terminal apparatusmay assume that the two antenna ports are QCL. The fact that two antenna ports are QCL may mean that the two antenna ports are assumed to be QCL.

Carrier aggregation may mean that communication is performed by using multiple serving cells being aggregated. In addition, carrier aggregation may mean that communication is performed by using multiple component carriers being aggregated. In addition, carrier aggregation may mean that communication is performed by using multiple downlink component carriers being aggregated. In addition, carrier aggregation may mean that communication is performed by using multiple uplink component carriers being aggregated.

5 FIG. 5 FIG. 3 3 30 34 30 31 32 33 34 35 36 is a schematic block diagram illustrating a configuration example of the base station apparatusaccording to an aspect of the present embodiment. As illustrated in, the base station apparatusincludes at least a part or all of a radio transmission and/or reception unit (physical layer processing unit)and/or a higher layer processing unit. The radio transmission and/or reception unitincludes at least a part or all of an antenna unit, a radio frequency (RF) unit, and a baseband unit. The higher layer processing unitincludes at least a part or all of a medium access control layer processing unitand a radio resource control (RRC) layer processing unit.

30 30 30 30 30 30 30 30 30 a b a b a b a b The radio transmission and/or reception unitincludes at least a part or all of a radio transmission unitand a radio reception unit. Here, apparatus configurations of the baseband unit included in the radio transmission unitand the baseband unit included in the radio reception unitmay be the same or different from each other. In addition, apparatus configurations of the RF unit included in the radio transmission unitand the RF unit included in the radio reception unitmay be the same or different from each other. In addition, apparatus configurations of the antenna unit included in the radio transmission unitand the antenna unit included in the radio reception unitmay be the same or different from each other.

30 30 30 30 30 30 30 30 30 a a a a a a a a a For example, the radio transmission unitmay generate and transmit a baseband signal of a PDSCH. For example, the radio transmission unitmay generate and transmit a baseband signal of a PDCCH. For example, the radio transmission unitmay generate and transmit a baseband signal of a PBCH. For example, the radio transmission unitmay generate and transmit a baseband signal of a synchronization signal. For example, the radio transmission unitmay generate and transmit a baseband signal of a PDSCH DMRS. For example, the radio transmission unitmay generate and transmit a baseband signal of a PDCCH DMRS. For example, the radio transmission unitmay generate and transmit a baseband signal of a CSI-RS. For example, the radio transmission unitmay generate and transmit a baseband signal of a DL PTRS. For example, a generator of the radio transmission unitmay generate a baseband signal of the PBCH.

30 30 30 30 30 30 30 b b b b b b b For example, the radio reception unitmay receive a PRACH. For example, the radio reception unitmay receive and demodulate a PUCCH. The radio reception unitmay receive and demodulate a PUSCH. For example, the radio reception unitmay receive a PUCCH DMRS. For example, the radio reception unitmay receive a PUSCH DMRS. For example, the radio reception unitmay receive a UL PTRS. For example, the radio reception unitmay receive an SRS.

34 30 30 34 a The higher layer processing unitoutputs downlink data (a transport block) to the radio transmission and/or reception unit(or the radio transmission unit). The higher layer processing unitperforms processing operations of a Medium Access Control (MAC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and an RRC layer.

35 34 The medium access control layer processing unitincluded in the higher layer processing unitperforms processing of the MAC layer.

36 34 36 1 36 1 The radio resource control layer processing unitincluded in the higher layer processing unitperforms processing of the RRC layer. The radio resource control layer processing unitmanages various pieces of configuration information/parameters (RRC parameters) of the terminal apparatus. The radio resource control layer processing unitsets the parameter based on an RRC message received from the terminal apparatus.

30 30 30 30 1 30 30 1 a a a The radio transmission and/or reception unit(or the radio transmission unit) performs processing such as modulation and encoding. The radio transmission and/or reception unit(or the radio transmission unit) generates a physical signal through modulation, encoding, and baseband signal generation (conversion into the time-continuous signal) on downlink data, and transmits the physical signal to the terminal apparatus. The radio transmission and/or reception unit(or the radio transmission unit) may map the physical signal to a certain component carrier and transmit the physical signal to the terminal apparatus.

30 30 30 30 34 30 30 b b b The radio transmission and/or reception unit(or the radio reception unit) performs processing such as demodulation and decoding. The radio transmission and/or reception unit(or the radio reception unit) separates, demodulates, and decodes the received physical signal, and outputs the decoded information to the higher layer processing unit. The radio transmission and/or reception unit(or the radio reception unit) may perform a channel access procedure prior to transmission of the physical signal.

32 31 32 The RF unitconverts (down-converts) a signal received via the antenna unitinto a baseband signal by means of orthogonal demodulation and removes unnecessary frequency components. The RF unitoutputs a processed analog signal to the baseband unit.

33 32 33 The baseband unitconverts an analog signal input from the RF unitinto a digital signal. The baseband unitremoves a portion corresponding to a cyclic prefix (CP) from the converted digital signal, performs a Fast Fourier Transform (FFT) on the signal from which the CP has been removed, and extracts a signal in the frequency domain.

33 33 32 The baseband unitperforms Inverse Fast Fourier Transform (IFFT) on the data to generate an OFDM symbol, adds a CP to the generated OFDM symbol, generates a baseband digital signal, and converts the baseband digital signal into an analog signal. The baseband unitoutputs the converted analog signal to the RF unit.

32 33 31 32 32 The RF unitremoves an unnecessary frequency component from the analog signal input from the baseband unitby using a low-pass filter, upconverts the analog signal into a signal having a carrier frequency, and transmits the signal via the antenna unit. In addition, the RF unitmay have a function of controlling transmission power. The RF unitis also referred to as a transmission power control unit.

1 For the terminal apparatus, one or multiple serving cells (or component carriers, downlink component carriers, uplink component carriers) may be configured.

1 Each of the serving cells configured for the terminal apparatusmay be one of a Primary cell (PCell), a Primary SCG cell (PSCell), or a Secondary Cell (SCell).

1 The PCell is a serving cell included in a Master Cell Group (MCG). The PCell is a cell in which an initial connection establishment procedure or a connection re-establishment procedure is performed (has been performed) by the terminal apparatus.

1 The PSCell is a serving cell included in a Secondary Cell Group (SCG). The PSCell is a serving cell in which random access is performed by the terminal apparatus.

The SCell may be included in either of the MCG or the SCG.

A serving cell group (cell group) is a term at least including an MCG and an SCG. The serving cell group may include one or multiple serving cells (or component carriers). One or multiple serving cells (or component carriers) included in the serving cell group may be operated by means of carrier aggregation.

One or multiple downlink BWPs may be configured for each of the serving cells (or downlink component carriers). One or multiple uplink BWPs may be configured for each of the serving cells (or uplink component carriers).

Among one or multiple downlink BWPs configured for the serving cell (or the downlink component carrier), one downlink BWP may be configured as an active downlink BWP (or one downlink BWP may be activated). Among one or multiple uplink BWPs configured for the serving cell (or the uplink component carrier), one uplink BWP may be configured as an active uplink BWP (or one uplink BWP may be activated).

1 1 The PDSCH, the PDCCH, and the CSI-RS may be received in the active downlink BWP. The terminal apparatusmay attempt to receive the PDSCH, the PDCCH, and the CSI-RS in the active downlink BWP. The PUCCH and the PUSCH may be transmitted in the active uplink BWP. The terminal apparatusmay transmit the PUCCH and the PUSCH in the active uplink BWP. The active downlink BWP and the active uplink BWP are also collectively referred to as active BWPs.

1 1 The PDSCH, the PDCCH, and the CSI-RS need not be received in downlink BWPs (inactive downlink BWPs) other than the active downlink BWP. The terminal apparatusneed not attempt to receive the PDSCH, the PDCCH, and the CSI-RS in downlink BWPs that are not active downlink BWPs. The PUCCH and the PUSCH need not be transmitted in uplink BWPs (inactive uplink BWPs) that are not active uplink BWPs. The terminal apparatusneed not transmit the PUCCH and the PUSCH in uplink BWPs that are not active uplink BWPs. The inactive downlink BWPs and the inactive uplink BWPs are also collectively referred to as inactive BWPs.

Downlink BWP switch is a procedure for deactivating one active downlink BWP of a certain serving cell and activating any one of the inactive downlink BWPs of the certain serving cell. The downlink BWP switch may be controlled by a BWP field included in downlink control information. The downlink BWP switch may be controlled based on a higher layer parameter.

Uplink BWP switch is used for deactivating one active uplink BWP and activating any one of the inactive uplink BWPs that are not the one active uplink BWP. The uplink BWP switch may be controlled by a BWP field included in downlink control information. The uplink BWP switch may be controlled based on a higher layer parameter.

Among one or multiple downlink BWPs configured for the serving cell, two or more downlink BWPs need not be configured for an active downlink BWP. For the serving cell, at certain times, one downlink BWP may be active.

Among one or multiple uplink BWPs configured for the serving cell, two or more uplink BWPs need not be configured for an active uplink BWP. For the serving cell, at certain times, one uplink BWP may be active.

6 FIG. 6 FIG. 1 1 10 14 10 11 12 13 14 15 16 is a schematic block diagram illustrating a configuration example of the terminal apparatusaccording to an aspect of the present embodiment. As illustrated in, the terminal apparatusincludes at least one or all of a radio transmission and/or reception unit (physical layer processing unit)and a higher layer processing unit. The radio transmission and/or reception unitincludes at least a part or all of an antenna unit, an RF unit, and a baseband unit. The higher layer processing unitincludes at least a part or all of a medium access control layer processing unitand a radio resource control layer processing unit.

10 10 10 13 10 13 10 12 10 12 10 11 10 11 10 a b a b a b a b The radio transmission and/or reception unitincludes at least a part or all of a radio transmission unitand a radio reception unit. Here, apparatus configurations of the baseband unitincluded in the radio transmission unitand the baseband unitincluded in the radio reception unitmay be the same or different from each other. In addition, apparatus configurations of the RF unitincluded in the radio transmission unitand the RF unitincluded in the radio reception unitmay be the same or different from each other. In addition, apparatus configurations of the antenna unitincluded in the radio transmission unitand the antenna unitincluded in the radio reception unitmay be the same or different from each other.

10 10 10 10 10 10 10 a a a a a a a For example, the radio transmission unitmay generate and transmit a baseband signal of a PRACH. For example, the radio transmission unitmay generate and transmit a baseband signal of a PUCCH. The radio transmission unitmay generate and transmit a baseband signal of a PUSCH. For example, the radio transmission unitmay generate and transmit a baseband signal of a PUCCH DMRS. For example, the radio transmission unitmay generate and transmit a baseband signal of a PUSCH DMRS. For example, the radio transmission unitmay generate and transmit a baseband signal of a UL PTRS. For example, the radio transmission unitmay generate and transmit a baseband signal of an SRS. Generating the baseband signal of the SRS may be generating an SRS sequence.

10 10 10 10 10 10 10 10 b b b b b b b b For example, the radio reception unitmay receive and demodulate a PDSCH. For example, the radio reception unitmay receive and demodulate a PDCCH. For example, the radio reception unitmay receive and demodulate a PBCH. For example, the radio reception unitmay receive a synchronization signal. For example, the radio reception unitmay receive a PDSCH DMRS. For example, the radio reception unitmay receive a PDCCH DMRS. For example, the radio reception unitmay receive a CSI-RS. For example, the radio reception unitmay receive a DL PTRS.

14 10 10 14 a The higher layer processing unitoutputs uplink data (a transport block) to the radio transmission and/or reception unit(or the radio transmission unit). The higher layer processing unitperforms processing operations of the MAC layer, a packet data convergence protocol layer, a radio link control layer, and the RRC layer.

15 14 The medium access control layer processing unitincluded in the higher layer processing unitperforms processing of the MAC layer.

16 14 16 1 16 3 The radio resource control layer processing unitincluded in the higher layer processing unitperforms processing of the RRC layer. The radio resource control layer processing unitmanages various pieces of configuration information/parameters (RRC parameters) of the terminal apparatus. The radio resource control layer processing unitsets the RRC parameters based on an RRC message received from the base station apparatus.

10 10 10 10 3 10 10 3 a a a The radio transmission and/or reception unit(or the radio transmission unit) performs processing such as modulation and encoding. The radio transmission and/or reception unit(or the radio transmission unit) generates a physical signal through modulation, encoding, and baseband signal generation (conversion into a time-continuous signal) on uplink data and transmits the physical signal to the base station apparatus. The radio transmission and/or reception unit(or the radio transmission unit) may map the physical signal to a certain BWP (an active uplink BWP) and transmit the physical signal to the base station apparatus.

10 10 10 30 10 10 14 10 10 b b b b The radio transmission and/or reception unit(or the radio reception unit) performs processing such as demodulation and decoding. The radio transmission and/or reception unit(or the radio reception unit) may receive a physical signal in a certain BWP (active downlink BWP) of a certain serving cell. The radio transmission and/or reception unit(or the radio reception unit) separates, demodulates, and decodes the received physical signal and outputs the decoded information to the higher layer processing unit. The radio transmission and/or reception unit(radio reception unit) may perform the channel access procedure prior to the transmission of the physical signal.

12 11 12 13 The RF unitconverts (down-converts) a signal received via the antenna unitinto a baseband signal by means of orthogonal demodulation and removes unnecessary frequency components. The RF unitoutputs a processed analog signal to the baseband unit.

13 12 13 The baseband unitconverts the analog signal input from the RF unitinto a digital signal. The baseband unitremoves a portion corresponding to a cyclic prefix (CP) from the converted digital signal, performs a Fast Fourier Transform (FFT) on the signal from which the CP has been removed, and extracts a signal of the frequency domain.

13 13 12 The baseband unitperforms an Inverse Fast Fourier Transform (IFFT) on the uplink data to generate an OFDM symbol, adds a CP to the generated OFDM symbol, generates a baseband digital signal, and converts the baseband digital signal into an analog signal. The baseband unitoutputs the converted analog signal to the RF unit.

12 13 11 12 12 The RF unitremoves unnecessary frequency components from the analog signal input from the baseband unitthrough a low-pass filter, upconverts the analog signal into a signal having a carrier frequency, and transmits the signal via the antenna unit. In addition, the RF unitmay have a function of controlling transmission power. The RF unitis also referred to as a transmission power control unit.

A physical signal (signal) will be described below.

A physical signal is a general term for a downlink physical channel, a downlink physical signal, an uplink physical channel, and an uplink physical channel. A physical channel is a general term for a downlink physical channel and an uplink physical channel. A physical signal is a general term for a downlink physical signal and an uplink physical signal.

1 3 Physical Uplink Control CHannel (PUCCH); Physical Uplink Shared CHannel (PUSCH); and Physical Random Access CHannel (PRACH). An uplink physical channel may correspond to a set of resource elements for conveying information that is generated in a higher layer. An uplink physical channel may be a physical channel used in an uplink component carrier. An uplink physical channel may be transmitted by the terminal apparatus. The uplink physical channel may be received by the base station apparatus. In the radio communication system according to an aspect of the present embodiment, at least a part or all of the following uplink physical channels may be used:

1 3 The PUCCH may be used to transmit Uplink Control Information (UCI). The PUCCH may be transmitted for conveying (delivering or transmitting) uplink control information. The uplink control information may be mapped to the PUCCH. The terminal apparatusmay transmit the PUCCH to which the uplink control information is mapped. The base station apparatusmay receive the PUCCH to which the uplink control information is mapped.

The uplink control information (uplink control information bit, uplink control information sequence, or uplink control information type) includes at least a part or all of Channel State Information (CSI), a Scheduling Request (SR), and Hybrid Automatic Repeat request ACKnowledgement (HARQ-ACK) information.

The channel state information is also referred to as a channel state information bit or a channel state information sequence. The scheduling request is also referred to as a scheduling request bit or a scheduling request sequence. The HARQ-ACK information is also referred to as a HARQ-ACK information bit or a HARQ-ACK information sequence.

The HARQ-ACK information may include at least a HARQ-ACK corresponding to a transport block (TB). The HARQ-ACK may indicate an acknowledgement (ACK) or a negative-acknowledgement (NACK) corresponding to the transport block. The ACK may indicate that decoding of the transport block has been decoded successfully. The NACK may indicate that decoding of the transport block has not been decoded successfully. The HARQ-ACK information may include a HARQ-ACK codebook including one or multiple HARQ-ACK bits.

The transport block is a sequence of information bits delivered from a higher layer. Here, the sequence of information bits is also referred to as a bit sequence. Here, the transport block may be delivered through an UpLink-Shared CHannel (UL-SCH) of a Transport layer.

A HARQ-ACK for the transport block may be referred to as a HARQ-ACK for a PDSCH. In this case, the “HARQ-ACK for the PDSCH” indicates a HARQ-ACK for a transport block included in a PDSCH.

The HARQ-ACK may indicate an ACK or a NACK corresponding to one code block group (CBG) included in the transport block.

1 1 A scheduling request may be at least used for requesting a resource of the UL-SCH for new transmission. A scheduling request bit may be used for indicating either of a positive SR or a negative SR. The scheduling request bit indicating the positive SR is also referred to as a “positive SR being conveyed”. The positive SR may indicate that the terminal apparatusrequests resources of the UL-SCH for new transmission. The positive SR may indicate that a scheduling request is triggered by a higher layer. The positive SR may be conveyed in a case that the higher layer indicates the scheduling request. The scheduling request bit indicating the negative SR is also referred to as a “negative SR being transmitted”. The negative SR may indicate that the terminal apparatusrequests no resources of the UL-SCH for new transmission. The negative SR may indicate that the scheduling request is not triggered by a higher layer. The negative SR may be conveyed in a case that the higher layer indicates no scheduling request.

Channel state information may include at least a part or all of a Channel Quality Indicator (CQI), a Precoder Matrix Indicator (PMI), and a Rank Indicator (RI). The CQI is an indicator related to quality (for example, propagation strength) of a propagation path or quality of a physical channel, and the PMI is an indicator related to a precoder. The RI is an indicator related to a transmission rank (or the number of transmission layers).

1 The channel state information is an indicator related to a reception state of a physical signal (for example, CSI-RS) at least used for channel measurement. A value of the channel state information may be determined by the terminal apparatusbased on the reception state assumed by a physical signal at least used for channel measurement. Channel measurement may include interference measurement.

The PUCCH may correspond to a PUCCH format. The PUCCH may be a set of resource elements used for conveying the PUCCH format. The PUCCH may include the PUCCH format.

The PUCCH may be transmitted in a certain PUCCH format. Note that the PUCCH format may be interpreted as a form of information. In addition, the PUCCH format may be interpreted as a set of information set in a certain form of information.

1 3 The PUSCH may be used for conveying one or both of a transport block and uplink control information. The transport block may be mapped to the PUSCH. The transport block delivered on the UL-SCH may be mapped to the PUSCH. The uplink control information may be mapped to the PUSCH. The terminal apparatusmay transmit the PUSCH to which one or both of the transport block and the uplink control information are mapped. The base station apparatusmay receive the PUSCH to which one or both of the transport block and the uplink control information are mapped.

1 3 u, v u, v u v RA u u u RA v RA RA RA The PRACH may be transmitted for conveying a random access preamble. The terminal apparatusmay transmit the PRACH. The base station apparatusmay receive the PRACH. A PRACH sequence x(n) is defined by x(n)=x(mod(n+C, L)). Here, xis a Zadoff Chu (ZC) sequence. In addition, xmay be defined by x=exp(−jπui(i+1)/L). j is an imaginary unit. In addition, π is the ratio of the circumference of a circle to its diameter. In addition, Ccorresponds to a cyclic shift of the PRACH sequence. In addition, Lcorresponds to the length of the PRACH sequence. In addition, Lis 839, or 139. In addition, i is an integer in the range from 0 to L−1. In addition, u is a sequence index for the PRACH sequence.

For each PRACH occasion, 64 random access preambles are defined. The random access preambles are identified based on the cyclic shift C, of the PRACH sequence and the sequence index u for the PRACH sequence. Each of the 64 identified random access preambles may be assigned an index.

Uplink physical signals may correspond to a set of resource elements. The uplink physical signals need not be used to convey information generated in a higher layer. Note that the uplink physical signals may be used to convey information generated in the physical layer.

1 3 UpLink Demodulation Reference Signal (UL DMRS); Sounding Reference Signal (SRS); and UpLink Phase Tracking Reference Signal (UL PTRS). The uplink physical signals may be physical signals used in an uplink component carrier. The terminal apparatusmay transmit the uplink physical signals. The base station apparatusmay receive the uplink physical signals. In the radio communication system according to an aspect of the present embodiment, at least a part or all of the following uplink physical signals may be used:

A UL DMRS is a general term for a DMRS for a PUSCH and a DMRS for a PUCCH.

A set of antenna ports of the DMRS for the PUSCH (the DMRS related to the PUSCH, the DMRS included in the PUSCH, or the DMRS corresponding to the PUSCH) may be given based on a set of antenna ports for the PUSCH. For example, the set of antenna ports of the DMRS for the PUSCH may be the same as a set of antenna ports of the PUSCH.

Transmission of the PUSCH and transmission of the DMRS for the PUSCH may be indicated (or may be scheduled) in one DCI format. The PUSCH and the DMRS for the PUSCH may be collectively referred to as a PUSCH. Transmission of the PUSCH may mean transmission of the PUSCH and the DMRS for the PUSCH.

A propagation path of the PUSCH may be inferred from the DMRS for the PUSCH.

A set of antenna ports of the DMRS for the PUCCH (a DMRS related to the PUCCH, a DMRS included in the PUCCH, or a DMRS corresponding to the PUCCH) may be the same as a set of antenna ports of the PUCCH.

Transmission of the PUCCH and transmission of the DMRS for the PUCCH may be indicated (or may be triggered) in one DCI format. One or both of resource element mapping of the PUCCH and resource element mapping of the DMRS for the PUCCH may be given in one PUCCH format. The PUCCH and the DMRS for the PUCCH may be collectively referred to as a PUCCH. Transmission of the PUCCH may mean transmission of the PUCCH and the DMRS for the PUCCH.

A propagation path of the PUCCH may be inferred from the DMRS for the PUCCH.

3 1 Physical Broadcast Channel (PBCH); Physical Downlink Control Channel (PDCCH); and Physical Downlink Shared Channel (PDSCH). A downlink physical channel may correspond to a set of resource elements for conveying information generated in a higher layer. A downlink physical channel may be a physical channel used in a downlink component carrier. The base station apparatusmay transmit a downlink physical channel. The terminal apparatusmay receive a downlink physical channel. In the radio communication system according to an aspect of the present embodiment, at least a part or all of the following downlink physical channels may be used:

The PBCH may be transmitted for conveying one or both of a Master Information Block (MIB) and physical layer control information. Here, the physical layer control information is information generated in the physical layer. The MIB is a set of parameters mapped to a Broadcast Control CHannel (BCCH) that is a logical channel of the MAC layer. The BCCH is mapped to a BCH that is a channel of a transport layer. The BCH may be mapped to the PBCH.

1 3 The terminal apparatusmay receive the PBCH to which one or both of the MIB and the physical layer control information are mapped. The base station apparatusmay transmit the PBCH to which one or both of the MIB and/or the physical layer control information are mapped.

0A) Radio frame bits 0B) Half radio frame (half system frame or half frame) bits 0C) SS/PBCH block index bits 0D) Subcarrier offset bits For example, the physical layer control information may include 8 bits. The physical layer control information may include at least a part or all of the following 0A to 0D.

The radio frame bit is used for indicating a radio frame in which the PBCH is transmitted (radio frame including a slot in which the PBCH is transmitted). The radio frame bit includes 4 bits. The radio frame bit may include 4 bits out of a 10-bit radio frame indicator. For example, the radio frame indicator may be at least used for identifying radio frames from index 0 to index 1023.

The half radio frame bit is used for indicating, out of the radio frame in which the PBCH is transmitted, which of the first five subframes or the last five subframes is used for transmission of the PBCH. Here, the half radio frame may include five subframes. In addition, the half radio frame may include the first five subframes out of the 10 subframes included in the radio frame. In addition, the half radio frame may include the last five subframes out of the 10 subframes included in the radio frame.

An SS/PBCH block index bit is used for indicating an SS/PBCH block index. The SS/PBCH block index bit includes 3 bits. The SS/PBCH block index bit may include 3 bits out of a 6-bit SS/PBCH block index indicator. The SS/PBCH block index indicator may be at least used for identifying SS/PBCH blocks of the index 0 to index 63.

A subcarrier offset bit is used for indicating a subcarrier offset. The subcarrier offset may be used for indicating a difference between the leading subcarrier to which the PBCH is mapped and the leading subcarrier to which the control resource set having the index 0 is mapped.

The PDCCH may be transmitted for conveying Downlink Control Information (DCI).

1 3 The downlink control information may be mapped to the PDCCH. The terminal apparatusmay receive the PDCCH to which the downlink control information is mapped. The base station apparatusmay transmit the PDCCH to which the downlink control information is mapped.

The downlink control information may be transmitted in a DCI format. Note that the DCI format may also be interpreted as the format of downlink control information. In addition, the DCI format may be interpreted as a set of downlink control information set to the format of certain downlink control information.

A DCI format 00, a DCI format 0_1, a DCI format 10, and a DCI format 1_1 are DCI formats. An uplink DCI format is a general term for the DCI format 0_0 and the DCI format 0_1.

A downlink DCI format is a general term for the DCI format 1_0 and the DCI format 1_1.

1A) Identifier field for DCI formats 1B) Frequency domain resource assignment field 1C) Time domain resource assignment field 1D) Frequency hopping flag field 1E) Modulation and Coding Scheme (MCS) field The DCI format 0_0 is at least used for scheduling of the PUSCH mapped to a certain cell. The DCI format 0_0 includes at least a part or all of fields listed from 1A to 1E.

An identifier field for DCI formats may indicate whether the DCI format including the identifier field for DCI formats is an uplink DCI format or a downlink DCI format. In other words, an identifier field for DCI formats may be included in each of the uplink DCI format and the downlink DCI format. Here, the identifier field for DCI formats included in the DCI format 0_0 may indicate 0.

A frequency domain resource assignment field included in the DCI format 0_0 may be used for indicating assignment of frequency resources for the PUSCH.

A time domain resource assignment field included in the DCI format 00 may be used for indicating assignment of time resources for the PUSCH.

A frequency hopping flag field may be used for indicating whether frequency hopping is applied to the PUSCH.

An MCS field included in the DCI format 0_0 may be at least used for indicating one or both of a modulation scheme for the PUSCH and a target encoding rate. The target encoding rate may be a target encoding rate for the transport block mapped to the PUSCH. A transport block size (TBS) mapped to the PUSCH may be determined based on one or both of the target encoding rate and the modulation scheme for the PUSCH.

The DCI format 0_0 need not include a field used for a CSI request.

1 The DCI format 0_0 need not include a carrier indicator field. In other words, the serving cell to which the uplink component carrier to which the PUSCH scheduled in the DCI format 00 is mapped belongs may be the same as the serving cell of the uplink component carrier to which the PDCCH including the DCI format 0_0 is mapped. Based on detection of the DCI format 0_0 in a certain downlink component carrier of a certain serving cell, the terminal apparatusmay recognize that the PUSCH scheduled in the DCI format 0_0 is mapped to the uplink component carrier of the certain serving cell.

1 The DCI format 0_0 need not include the BWP field. Here, the DCI format 0_0 may be a DCI format for scheduling the PUSCH without changing an active uplink BWP. The terminal apparatusmay recognize that the PUSCH is transmitted without switching the active uplink BWP based on detection of the DCI format 0_0 used for the scheduling of the PUSCH.

2A) Identifier field for DCI formats 2B) Frequency domain resource assignment field 2C) Uplink time domain resource assignment field 2D) Frequency hopping flag field 2E) MCS field 2F) CSI request field 2G) BWP field 2H) Carrier indicator field The DCI format 0_1 is at least used for scheduling of the PUSCH mapped to a certain cell. The DCI format 0_1 includes at least a part or all of fields listed from 2A to 2H.

The identifier field for DCI formats included in the DCI format 0_1 may indicate 0.

The frequency domain resource assignment field included in the DCI format 0_1 may be used for indicating assignment of frequency resources for the PUSCH.

The time domain resource assignment field included in the DCI format 0_1 may be used for indicating assignment of time resources for the PUSCH.

The MCS field included in the DCI format 0_1 may be at least used for indicating a part or all of a modulation scheme for the PUSCH and/or a target encoding rate.

1 The BWP field of the DCI format 0_1 may be used for indicating an uplink BWP to which the PUSCH scheduled in the DCI format 0_1 is mapped. In other words, the DCI format 01 may be accompanied by a change in the active uplink BWP. The terminal apparatusmay recognize the uplink BWP to which the PUSCH is mapped based on detection of the DCI format 0_1 used for scheduling of the PUSCH.

1 The DCI format 0_1 not including the BWP field may be a DCI format for scheduling the PUSCH without changing the active uplink BWP. The terminal apparatusmay recognize that the PUSCH is transmitted without switching the active uplink BWP based on detection of the DCI format D0_1 which is the DCI format 0_1 used for the scheduling of the PUSCH and does not include the BWP field.

1 1 1 1 1 1 In a case that the BWP field is included in the DCI format 0_1 but the terminal apparatusdoes not support the function of switching the BWP according to the DCI format 0_1, the terminal apparatusmay disregard the BWP field. In other words, the terminal apparatuswhich does not support the function of switching the BWP may recognize that the PUSCH is transmitted without switching the active uplink BWP based on detection of the DCI format 0_1 which is the DCI format 0_1 used for the scheduling of the PUSCH and includes the BWP field. Here, in a case that the terminal apparatussupports the function of switching the BWP, the terminal apparatusmay report, in a function information reporting procedure of the RRC layer, that “the terminal apparatussupports the function of switching the BWP”.

The CSI request field is used for indicating a report of CSI.

1 1 In a case that a carrier indicator field is included in the DCI format 0_1, the carrier indicator field may be used for indicating the uplink component carrier to which the PUSCH is mapped. In a case that a carrier indicator field is not included in the DCI format 0_1, the uplink component carrier to which the PUSCH is mapped may be the same as the uplink component carrier to which the PDCCH including the DCI format 0_1 used for scheduling of the PUSCH is mapped. In a case that the number of uplink component carriers configured for the terminal apparatusin a certain serving cell group is two or more (a case that uplink carrier aggregation is operated in a certain serving cell group), the number of bits of the carrier indicator field included in the DCI format 0_1 used for scheduling of the PUSCH mapped to the certain serving cell group may be 1 bit or more (for example, 3 bits). In a case that the number of uplink component carriers configured for the terminal apparatusin a certain serving cell group is one (a case that uplink carrier aggregation is not operated in a certain serving cell group), the number of bits of the carrier indicator field included in the DCI format 0_1 used for scheduling of the PUSCH mapped to the certain serving cell group may be 0 bits (or the carrier indicator field may not be included in the DCI format 0_1 used for scheduling of the PUSCH mapped to the certain serving cell group).

3A) Identifier field for DCI formats; 3B) Frequency domain resource assignment field; 3C) Time domain resource assignment field; 3D) MCS field; 3E) PDSCH_HARQ feedback timing indicator field (PDSCH to HARQ feedback timing indicator field); and 3F) PUCCH resource indicator field. The DCI format 1_0 is at least used for scheduling of the PDSCH mapped to a certain cell. The DCI format 1_0 includes at least a part or all of 3A to 3F:

The identifier field for DCI formats included in the DCI format 1_0 may indicate 1.

The frequency domain resource assignment field included in the DCI format 10 may be at least used for indicating assignment of frequency resources for the PDSCH.

The time domain resource assignment field included in the DCI format 1_0 may be at least used for indicating assignment of time resources for the PDSCH.

The MCS field included in the DCI format 1_0 may be at least used for indicating one or both of the modulation scheme for the PDSCH and the target encoding rate. The target encoding rate may be a target encoding rate for a transport block mapped to the PDSCH. The size of a transport block (Transport Block Size or TBS) mapped to the PDSCH may be determined based on one or both of the target encoding rate and the modulation scheme for the PDSCH.

The PDSCH_HARQ feedback timing indicator field may be used for indicating an offset from the slot including the last OFDM symbol of the PDSCH to the slot including the first OFDM symbol of the PUCCH.

The PUCCH resource indicator field may be a field indicating an index of any of one or multiple PUCCH resources included in a PUCCH resource set. The PUCCH resource set may include one or multiple PUCCH resources.

1 The DCI format 10 may not include the carrier indicator field. In other words, the downlink component carrier to which the PDSCH scheduled by using the DCI format 1_0 is mapped may be the same as the downlink component carrier to which the PDCCH including the DCI format 1_0 is mapped. Based on detection of the DCI format 1_0 on a certain downlink component carrier, the terminal apparatusmay recognize that the PDSCH scheduled in the DCI format 1_0 is mapped to the downlink component carrier.

1 The DCI format 10 may not include a BWP field. Here, DCI format 10 may be a DCI format for scheduling the PDSCH without changing the active downlink BWP. The terminal apparatusmay recognize that the PDSCH is received without switching the active downlink BWP based on detection of the DCI format 1_0 used in scheduling of the PDSCH.

4A) Identifier field for DCI formats; 4B) Frequency domain resource assignment field; 4C) Time domain resource assignment field; 4E) MCS field; 4F) PDSCH_HARQ feedback timing indicator field; 4G) PUCCH resource indicator field; 4H) BWP field; and 4I) Carrier indicator field. The DCI format 1_1 is at least used for scheduling of the PDSCH mapped to a certain cell. The DCI format 1_1 includes at least some or all of 4A to 4I:

The identifier field for DCI formats included in the DCI format 1_1 may indicate 1.

The frequency domain resource assignment field included in the DCI format 11 may be at least used for indicating assignment of frequency resources for the PDSCH.

The time domain resource assignment field included in the DCI format 1_1 may be at least used for indicating assignment of time resources for the PDSCH.

The MCS field included in the DCI format 1_1 may be at least used for indicating one or both of the modulation scheme for the PDSCH and the target encoding rate.

In a case that the PDSCH_HARQ feedback timing indicator field is included in the DCI format 1_1, the PDSCH_HARQ feedback timing indicator field may be at least used for indicating an offset from the slot including the last OFDM symbol of the PDSCH to the slot including the first OFDM symbol of the PUCCH. In a case that the PDSCH_HARQ feedback timing indicator field is not included in the DCI format 1_1, an offset from the slot including the last OFDM symbol of the PDSCH to the slot including the first OFDM symbol of the PUCCH may be identified by a higher layer parameter.

The PUCCH resource indicator field may be a field indicating an index of any of one or multiple PUCCH resources included in a PUCCH resource set.

1 The BWP field of the DCI format 11 may be used to indicate the downlink BWP to which the PDSCH scheduled in the DCI format 1_1 is mapped. In other words, the DCI format 11 may be accompanied by a change in the active downlink BWP. The terminal apparatusmay recognize the downlink BWP to which the PUSCH is mapped based on detection of the DCI format 1_1 used for the scheduling of the PDSCH.

1 The DCI format 1_1 not including the BWP field may be a DCI format for scheduling the PDSCH without changing the active downlink BWP. The terminal apparatusmay recognize that the PDSCH is received without switching the active downlink BWP based on detection of the DCI format 1_1 which is used for the scheduling of the PDSCH and the DCI format 1_1 not including the BWP field.

1 1 1 1 1 1 In a case that the DCI format 1_1 includes the BWP field but the terminal apparatusdoes not support the function of switching the BWP according to the DCI format 1_1, the terminal apparatusmay disregard the BWP field. In other words, the terminal apparatuswhich does not support the function of switching the BWP may recognize that the PDSCH is received without switching the active downlink BWP based on detection of the DCI format 1_1 which is used for the scheduling of the PDSCH and the DCI format 1_1 including the BWP field. Here, in a case that the terminal apparatussupports the function of switching the BWP, the terminal apparatusmay report, in a function information reporting procedure of the RRC layer, that “the terminal apparatussupports the function of switching the BWP”.

1 1 In a case that the carrier indicator field is included in the DCI format 1_1, the carrier indicator field may be used for indicating the downlink component carrier to which the PDSCH is mapped. In a case that the carrier indicator field is not included in the DCI format 1_1, the downlink component carrier to which the PDSCH is mapped may be the same as the downlink component carrier to which the PDCCH including the DCI format 1_1 used for scheduling of the PDSCH is mapped. In a case that the number of downlink component carriers configured for the terminal apparatusin a certain serving cell group is two or more (a case that downlink carrier aggregation is operated in a certain serving cell group), the number of bits of the carrier indicator field included in the DCI format 1_1 used for scheduling of the PDSCH mapped to the certain serving cell group may be 1 bit or more (for example, 3 bits). In a case that the number of downlink component carriers configured for the terminal apparatusin a certain serving cell group is one (a case that downlink carrier aggregation is not operated in a certain serving cell group), the number of bits of the carrier indicator field included in the DCI format 1_1 used for scheduling of the PDSCH mapped to the certain serving cell group may be 0 bits (or the carrier indicator field may not be included in the DCI format 1_1 used for scheduling of the PDSCH mapped to the certain serving cell group).

3 1 The PDSCH may be transmitted for conveying a transport block. The PDSCH may be used for transmitting a transport block delivered on the DL-SCH. The PDSCH may be used for conveying a transport block. A transport block may be mapped to the PDSCH. The transport block corresponding to the DL-SCH may be mapped to the PDSCH. The base station apparatusmay transmit the PDSCH. The terminal apparatusmay receive the PDSCH.

3 1 Synchronization signal (SS); DownLink DeModulation Reference Signal (DL DMRS); Channel State Information-Reference Signal (CSI-RS); and DownLink Phase Tracking Reference Signal (DL PTRS). A downlink physical signal may correspond to a set of resource elements. The downlink physical signal may not carry information generated in a higher layer. The downlink physical signal may be a physical signal used in a downlink component carrier. The downlink physical signal may be transmitted by the base station apparatus. The downlink physical signal may be transmitted by the terminal apparatus. In the radio communication system according to an aspect of the present embodiment, at least some or all of the following downlink physical signals may be used:

1 The synchronization signal may be used for the terminal apparatusto take synchronization in one or both of the frequency domain and the time domain in downlink. The synchronization signal is a general term for a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

7 FIG. 7 FIG. symb 700 720 710 711 712 713 is a diagram illustrating a configuration example of the SS/PBCH block according to an aspect of the present embodiment. In, the horizontal axis corresponds to a time axis (OFDM symbol index L), and the vertical axis represents the frequency domain. In addition, a blockrepresents a set of resource elements for a PSS. In addition, a blockrepresents a set of resource elements for an SSS. In addition, four blocks (blocks,,, and) represent a set of resource elements for a PBCH and a DMRS for the PBCH (DMRS related to the PBCH, DMRS included in the PBCH, or DMRS corresponding to the PBCH).

7 FIG. As illustrated in, the SS/PBCH block includes a PSS, an SSS, and a PBCH. In addition, the SS/PBCH block includes four continuous OFDM symbols. The SS/PBCH block includes 240 subcarriers. The PSS is mapped to the 57th to 183rd subcarriers in the first OFDM symbol. The SSS is mapped to the 57th to 183rd subcarriers in the third OFDM symbol. Zero may be set to the 1st to 56th subcarriers of the first OFDM symbol. Zero may be set to the 184th to 240th subcarriers of the first OFDM symbol. Zero may be set to the 49th to 56th subcarriers of the third OFDM symbol. Zero may be set to the 184th to 192nd subcarriers of the third OFDM symbol. The PBCH is mapped to subcarriers which are the 1st to 240th subcarriers of the second OFDM symbol and to which a DMRS for the PBCH is not mapped. The PBCH is mapped to subcarriers which are the 1st to 48th subcarriers of the third OFDM symbol and to which a DMRS for the PBCH is not mapped. The PBCH is mapped to subcarriers which are the 193rd to 240th subcarriers of the third OFDM symbol and to which a DMRS for the PBCH is not mapped. The PBCH is mapped to subcarriers which are the 1st to 240th subcarriers of the fourth OFDM symbol and to which a DMRS for the PBCH is not mapped.

The antenna ports of the PSS, the SSS, the PBCH, and the DMRS for the PBCH may be the same.

The PBCH over which the symbol of the PBCH on a certain antenna port is conveyed may be inferred from the DMRS for the PBCH mapped to the slot to which the PBCH is mapped and the DMRS for the PBCH included in the SS/PBCH block including the PBCH.

The DL DMRS is a general term for a DMRS for the PBCH, a DMRS for the PDSCH, and a DMRS for the PDCCH.

A set of antenna ports of the DMRS for the PDSCH (a DMRS related to the PDSCH, a DMRS included in the PDSCH, or a DMRS corresponding to the PDSCH) may be given based on a set of antenna ports for the PDSCH. In other words, the set of antenna ports of the DMRS for the PDSCH may be the same as the set of antenna ports for the PDSCH.

Transmission of the PDSCH and transmission of the DMRS for the PDSCH may be indicated (or may be scheduled) in one DCI format. The PDSCH and the DMRS for the PDSCH may be collectively referred to as a PDSCH. Transmission of the PDSCH may be transmission of the PDSCH and the DMRS for the PDSCH.

A propagation path of the PDSCH may be inferred from the DMRS for the PDSCH. In a case that a set of resource elements in which the symbol of a certain PDSCH is conveyed and a set of resource elements in which the symbol of the DMRS for the certain PDSCH is conveyed are included in the same Precoding Resource Group (PRG), the PDSCH over which the symbol of the PDSCH on a certain antenna port is conveyed may be inferred from the DMRS for the PDSCH.

The antenna port of the DMRS for the PDCCH (the DMRS related to the PDCCH, the DMRS included in the PDCCH, or the DMRS corresponding to the PDCCH) may be the same as the antenna port for the PDCCH.

The PDCCH may be inferred from the DMRS for the PDCCH. In other words, a propagation path of the PDCCH may be inferred from the DMRS for the PDCCH. In a case that the same precoder is applied (in a case that the same precoder is assumed to be applied, or in a case of assuming that the same precoder is applied) to a set of resource elements in which the symbol of a certain PDCCH is conveyed and a set of resource elements in which the symbol of the DMRS for the certain PDCCH is conveyed, the PDCCH over which the symbol of the PDCCH on a certain antenna port is conveyed may be inferred from the DMRS for the PDCCH.

A Broadcast CHannel (BCH), an Uplink-Shared CHannel (UL-SCH), and a Downlink-Shared CHannel (DL-SCH) are transport channels. A transport channel defines the relationship between a physical layer channel and a MAC layer channel (also referred to as a logical channel).

A BCH of the transport layer is mapped to the PBCH of the physical layer. In other words, a transport block passing through the BCH of the transport layer is delivered to the PBCH of the physical layer. In addition, the UL-SCH of the transport layer is mapped to the PUSCH of the physical layer. In other words, the transport block passing through the UL-SCH of the transport layer is delivered to the PUSCH of the physical layer. In addition, the DL-SCH of the transport layer is mapped to the PDSCH of the physical layer. In other words, a transport block passing through the DL-SCH of the transport layer is delivered to the PDSCH of the physical layer.

One UL-SCH and one DL-SCH may be given to each serving cell. The BCH may be given to a PCell. The BCH may not be given to a PSCell and an SCell.

In the MAC layer, control over a Hybrid Automatic Repeat reQuest (HARQ) is performed for each transport block.

1 1 1 1 A Broadcast Control CHannel (BCCH), a Common Control CHannel (CCCH), and a Dedicated Control CHannel (DCCH) are logical channels. For example, the BCCH is a channel of the RRC layer used for transmitting a MIB or system information. In addition, a Common Control CHannel (CCCH) may be used for transmitting a common RRC message in multiple terminal apparatuses. Here, the CCCH may be, for example, used for a terminal apparatusthat is not in a state of RRC connection. In addition, a Dedicated Control CHannel (DCCH) may be at least used for transmitting an RRC message dedicated to a terminal apparatus. Here, the DCCH may be, for example, used for the terminal apparatusthat is in a state of RRC connection.

1 1 1 1 A higher layer parameter common to multiple terminal apparatusesis also referred to as a common higher layer parameter. Here, the common higher layer parameter may be defined as a parameter specific to a serving cell. Here, a parameter specific to a serving cell may be a parameter common to terminal apparatuses configured with the serving cell (for example, terminal apparatuses-A,-B, and-C).

For example, an RRC message delivered to the BCCH may include the common higher layer parameter. For example, an RRC message delivered on the DCCH may include the common higher layer parameter.

1 1 1 1 Among certain higher layer parameters, a higher layer parameter different from the common higher layer parameter is also referred to as a dedicated higher layer parameter. Here, the dedicated higher layer parameter can provide a dedicated RRC parameter to the terminal apparatus-A configured with the serving cell. In other words, the dedicated RRC parameter is a higher layer parameter capable of providing a unique configuration to each of the terminal apparatuses-A,-B, and-C.

The BCCH of the logical channel may be mapped to the BCH or the DL-SCH of the transport layer. For example, a transport block including information of an MIB is delivered to the BCH of the transport layer. In addition, a transport block including system information other than the MIB is delivered to the DL-SCH of the transport layer. In addition, the CCCH is mapped to the DL-SCH or the UL-SCH. In other words, a transport block mapped to the CCCH is delivered to the DL-SCH or the UL-SCH. In addition, the DCCH is mapped to the DL-SCH or the UL-SCH. In other words, a transport block mapped to the DCCH is delivered to the DL-SCH or the UL-SCH.

An RRC message includes one or multiple parameters managed in the RRC layer. Here, the parameters managed in the RRC layer are also referred to as RRC parameters. For example, the RRC message may include the MIB. In addition, the RRC message may include system information. In addition, the RRC message may include a message corresponding to the CCCH.

In addition, the RRC message may include a message corresponding to the DCCH. An RRC message including a message corresponding to the DCCH is also referred to as an individual RRC message.

A higher layer parameter (parameter in higher layer) is an RRC parameter or a parameter included in a Medium Access Control Control Element (MAC CE). In other words, the higher layer parameter is a general term for the MIB, the system information, a message corresponding to the CCCH, a message corresponding to the DCCH, and a parameter included in a MAC CE.

The parameter included in the MAC CE is transmitted by using a MAC Control Element (CE) command.

1 5A) Cell search; 5B) Random access; and 5C) Data communication Procedures performed by the terminal apparatusinclude at least some or all of the following 5A to 5C:

1 1 The cell search is a procedure used for the terminal apparatussynchronizing with a certain cell related to the time domain and the frequency domain and detecting a physical cell identity (physical cell ID). In other words, by means of the cell search, the terminal apparatusmay perform synchronization with a certain cell in the time domain and the frequency domain and detect a physical cell ID.

A sequence of the PSS is given based at least on the physical cell ID. A sequence of the SSS is given based at least on the physical cell ID.

An SS/PBCH block candidate indicates a resource allowed to (possible to, scheduled to, configured to, defined to, having a possibility to) transmit the SS/PBCH block.

A set of SS/PBCH block candidates in a certain half radio frame is also referred to as an SS burst set. The SS burst set is also referred to as a transmission window (transmissionwindow), an SS transmission window, or a Discovery Reference Signal transmission window (DRS transmission window). The SS burst set is a general term including at least a first SS burst set and a second SS burst set.

3 1 The base station apparatustransmits SS/PBCH blocks with one or multiple indices with a prescribed period. The terminal apparatusmay detect at least one SS/PBCH block out of the SS/PBCH blocks with one or multiple indices and attempt decoding of the PBCH included in the SS/PBCH block.

The random access is a procedure including at least some or all of a message 1, a message 2, a message 3, and a message 4.

1 1 The message 1 is a procedure in which the PRACH is transmitted by the terminal apparatus. The terminal apparatustransmits the PRACH in one PRACH occasion selected out of one or multiple PRACH occasions based at least on the index of the SS/PBCH block candidate detected based on the cell search. Each of the PRACH occasions is defined based at least on resources in the time domain and the frequency domain.

1 The terminal apparatustransmits one random access preamble selected out of the PRACH occasions corresponding to the indices of the SS/PBCH block candidates in which the SS/PBCH block is detected.

1 1 The message 2 is a procedure of attempting to detect a DCI format 1_0 with a Cyclic Redundancy Check (CRC) scrambled by a Random Access-Radio Network Temporary Identifier (RA-RNTI) by the terminal apparatus. The terminal apparatusattempts detection of the PDCCH including the DCI format in a control resource set given based on the MIB, which is included in the PBCH included in the SS/PBCH block detected based on a cell search, and in resources indicated based on a configuration of a search space set. The message 2 is also referred to as a random access response.

The message 3 is a procedure of transmitting the PUSCH scheduled by using a random access response grant included in the DCI format 1_0 detected through the procedure of the message 2. Here, the random access response grant (random access responsegrant) is indicated by the MAC CE included in the PDSCH scheduled by using the DCI format 1_0.

The PUSCH scheduled based on the random access response grant is either a message 3 PUSCH or a PUSCH. The message 3 PUSCH includes a contention resolution identifier (contention resolution ID) MAC CE. The contention resolution ID MAC CE includes a contention resolution ID.

Retransmission of the message 3 PUSCH is scheduled by using a DCI format 0_0 with a CRC scrambled based on a Temporary Cell—Radio Network Temporary Identifier (TC-RNTI).

1 The message 4 is a procedure of attempting to detect the DCI format 1_0 with a CRC scrambled based on either of a Cell-Radio Network Temporary Identifier (C-RNTI) or a TC-RNTI. The terminal apparatusreceives a PDSCH scheduled based on the DCI format 1_0. The PDSCH may include a contention resolution ID.

Data communication is a general term for downlink communication and uplink communication.

1 In the data communication, the terminal apparatusattempts detection of the PDCCH (monitors the PDCCH or supervises the PDCCH) in a control resource set and resources identified based on a search space set.

The control resource set is a set of resources including a certain number of resource blocks and a certain number of OFDM symbols. In the frequency domain, the control resource set may include continuous resources (non-interleaved mapping) or may include distributed resources (interleaver mapping).

A set of resource blocks constituting the control resource set may be indicated by a higher layer parameter. The number of OFDM symbols constituting the control resource set may be indicated by a higher layer parameter.

1 The terminal apparatusattempts detection of the PDCCH in a search space set. Here, an attempt to detect the PDCCH in the search space set may be an attempt to detect a candidate of the PDCCH in the search space set, may be an attempt to detect a DCI format in the search space set, may be an attempt to detect the PDCCH in the control resource set, may be an attempt to detect a candidate of the PDCCH in the control resource set, or may be an attempt to detect a DCI format in the control resource set.

1 The search space set is defined as a set of candidates of the PDCCH. The search space set may be a Common Search Space (CSS) set or may be a UE-specific Search Space (USS) set. The terminal apparatusattempts detection of candidates of the PDCCH in some or all of a Type 0 PDCCH common search space set, a Type 0a PDCCH common search space set, a Type 1 PDCCH common search space set, a Type 2 PDCCH common search space set, a Type 3 PDCCH common search space set, and/or a UE-specific PDCCH search space set (UE-specific search space set).

The Type 0 PDCCH common search space set may be used as a common search space set having the index 0. The Type 0 PDCCH common search space set may be a common search space set having the index 0.

A CSS set is a general term for the Type 0 PDCCH common search space set, the Type 0a PDCCH common search space set, the Type 1 PDCCH common search space set, the Type 2 PDCCH common search space set, and the Type 3 PDCCH common search space set. A USS set is also referred to as a UE-specific PDCCH search space set.

A certain search space set is related to (included in or corresponds to) a certain control resource set. The index of the control resource set related to the search space set may be indicated by a higher layer parameter.

6 6 6 6 For a certain search space set, some or all ofA toC may be indicated by at least a higher layer parameter: 6A) PDCCH monitoring periodicityB) PDCCH monitoring pattern within a slotC) PDCCH monitoring offset

The monitoring occasion of a certain search space set may correspond to the OFDM symbol to which the first OFDM symbol of a control resource set related to the certain search space set is mapped. The monitoring occasion of a certain search space set may correspond to a resource of a control resource set starting from the first OFDM symbol of the control resource set related to the certain search space set. The monitoring occasion of the search space set is given based at least on some or all of the monitoring periodicity of the PDCCH, the monitoring pattern of the PDCCH in a slot, and a monitoring offset of the PDCCH.

8 FIG. 8 FIG. 91 92 301 93 302 94 303 is a diagram illustrating an example of the monitoring occasions for the search space sets according to an aspect of the present embodiment. In, search space setand search space setare configured in a primary cell, search space setis configured in a secondary cell, and search space setis configured in a secondary cell.

8 FIG. 301 91 301 92 302 93 303 94 In, solid white blocks in the primary cellrepresent the search space set, solid black blocks in the primary cellrepresent the search space set, blocks in the secondary cellrepresent the search space set, and blocks in the secondary cellrepresent the search space set.

91 91 91 91 The monitoring periodicity of the search space setis set to one slot, the monitoring offset of the search space setis set to zero slots, and the monitoring pattern of the search space setis set to [1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0]. In other words, the monitoring occasions for the search space setcorrespond to the first OFDM symbol (OFDM symbol #0) and the eighth OFDM symbol (OFDM symbol #7) in each of the slots.

92 92 92 92 The monitoring periodicity of the search space setis set to two slots, the monitoring offset of the search space setis set to zero slots, and the monitoring pattern of the search space setis set to [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. In other words, the monitoring occasion for the search space setcorresponds to the first OFDM symbol (OFDM symbol #0) in each of the even-numbered slots.

93 93 93 93 The monitoring periodicity of the search space setis set to two slots, the monitoring offset of the search space setis set to zero slots, and the monitoring pattern of the search space setis set to [0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0]. In other words, the monitoring occasion for the search space setcorresponds to the eighth OFDM symbol (OFDM symbol #7) in each of the even-numbered slots.

94 94 94 94 The monitoring periodicity of the search space setis set to two slots, the monitoring offset of the search space setis set to one slot, and the monitoring pattern of the search space setis set to [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. In other words, the monitoring occasion for the search space setcorresponds to the first OFDM symbol (OFDM symbol #0) in each of the odd-numbered slots.

The Type 0 PDCCH common search space set may be at least used for the DCI format with a Cyclic Redundancy Check (CRC) sequence scrambled by a System Information-Radio Network Temporary Identifier (SI-RNTI).

The Type 0a PDCCH common search space set may be at least used for the DCI format with a Cyclic Redundancy Check (CRC) sequence scrambled by a System Information-Radio Network Temporary Identifier (SI-RNTI).

The Type 1 PDCCH common search space set may be at least used for the DCI format with a CRC sequence scrambled by a Random Access-Radio Network Temporary Identifier (RA-RNTI) and/or a CRC sequence scrambled by a Temporary Cell-Radio Network Temporary Identifier (TC-RNTI).

The Type 2 PDCCH common search space set may be used for the DCI format with a CRC sequence scrambled by a Paging-Radio Network Temporary Identifier (P-RNTI).

The Type 3 PDCCH common search space set may be used for the DCI format with a CRC sequence scrambled by a Cell-Radio Network Temporary Identifier (C-RNTI).

The UE-specific PDCCH search space set may be at least used for the DCI format with a CRC sequence scrambled by C-RNTI.

1 In downlink communication, the terminal apparatusdetects a downlink DCI format.

1 3 The detected downlink DCI format is at least used for resource assignment of the PDSCH. The detected downlink DCI format is also referred to as downlink assignment. The terminal apparatusattempts reception of the PDSCH. A HARQ-ACK corresponding to the PDSCH (HARQ-ACK corresponding to the transport block included in the PDSCH) is reported to the base station apparatusbased on PUCCH resources indicated based on the detected downlink DCI format.

1 1 In uplink communication, the terminal apparatusdetects an uplink DCI format. The detected DCI format is at least used for resource assignment of the PUSCH. The detected uplink DCI format is also referred to as an uplink grant. The terminal apparatusperforms transmission of the PUSCH.

In configured scheduling (configured grant), the uplink grant for scheduling the PUSCH is configured for each transmission periodicity of the PUSCH. A part or all of pieces of information indicated by an uplink DCI format in a case that the PUSCH is scheduled by the uplink DCI format may be indicated by the uplink grant configured in a case of the configured scheduling.

A UL slot may be a slot including a UL symbol. A special slot may be a slot including a UL symbol, a flexible symbol, and a DL symbol. A DL slot may be a slot including a DL symbol.

The UL symbol may be an OFDM symbol configured or indicated for uplink in time division duplex. The UL symbol may be an OFDM symbol configured or indicated for the PUSCH, the PUCCH, the PRACH, or the SRS. The UL symbol may be provided by a higher layer parameter tdd-UL-DL-ConfigurationCommon. The UL symbol may be provided by a higher layer parameter tdd-UL-DL-ConfigurationDedicated. The UL slot may be provided by the higher layer parameter tdd-UL-DL-ConfigurationCommon. The UL slot may be provided by the higher layer parameter tdd-UL-DL-ConfigurationDedicated.

The DL symbol may be an OFDM symbol configured or indicated for downlink in time division duplex. The DL symbol may be an OFDM symbol configured or indicated for the PDSCH or the PDCCH. The DL symbol may be provided by the higher layer parameter tdd-UL-DL-ConfigurationCommon. The DL symbol may be provided by the higher layer parameter tdd-UL-DL-ConfigurationDedicated. The DL slot may be provided by the higher layer parameter tdd-UL-DL-ConfigurationCommon. The DL slot may be provided by the higher layer parameter tdd-UL-DL-ConfigurationDedicated.

The flexible symbol may be an OFDM symbol that is not configured or indicated as a UL symbol or a DL symbol among the OFDM symbols within a certain periodicity. The certain periodicity may be a periodicity given by a higher layer parameter dl-UL-TransmissionPeriodicity. The flexible symbol may be an OFDM symbol configured or indicated for the PDSCH, the PDCCH, the PUSCH, the PUCCH, or the PRACH.

The higher layer parameter tdd-UL-DL-ConfigurationCommon may be a parameter for configuring one of a UL slot, a DL slot, and a special slot for each of one or multiple slots. The higher layer parameter tdd-UL-DL-ConfigurationDedicated may be a parameter for configuring any one of a UL symbol, a DL symbol, and a flexible symbol for a flexible symbol in each of the one or multiple slots. tdd-UL-DL-ConfigurationCommon may be a common higher layer parameter. tdd-UL-DL-ConfigurationDedicated may be a dedicated higher layer parameter.

1 1 PUSCH-Config may be a dedicated higher layer parameter. PUSCH-ConfigCommon may be a common higher layer parameter. PUSCH-Config may be configured per BWP for PUSCH transmission. PUSCH-Config may include multiple higher layer parameters related to PUSCH transmission. PUSCH-Config may be a UE-specific configuration. For example, PUSCH-Config for the terminal apparatus TA, the terminal apparatusB, and the terminal apparatusC in one cell, or multiple higher layer parameters included in PUSCH-Config may vary. PUSCH-ConfigCommon may be configured per BWP for PUSCH transmission. PUSCH-ConfigCommon may include multiple higher layer parameters related to PUSCH transmission.

1 1 PUSCH-ConfigCommon may be a cell-specific configuration. For example, PUSCH-ConfigCommon for the terminal apparatus TA, the terminal apparatusB, and the terminal apparatusC in one cell may be common. For example, PUSCH-ConfigCommon may be provided in system information.

Repetitive transmission may be applied to the PUSCH. For example, repetitive transmission may be applied to the PUSCH scheduled by the DCI. In addition, repetitive transmission may be applied to the PUSCH scheduled by a configured uplink grant. A PUSCH repetition type may be one of a PUSCH repetition type A and a PUSCH repetition type B. The PUSCH repetition type may be configured by a higher layer parameter. The PUSCH repetition type may be based on a DCI format. For example, the first PUSCH repetition type for the PUSCH scheduled in the DCI format 0_1 may be different from the second PUSCH repetition type for the PUSCH scheduled in the DCI format 0_2.

The number of repetitions for PUSCH repetitive transmission may be configured by a higher layer parameter. For example, the higher layer parameter numberOfRepetitioins may be a parameter including the number of repetitions for the PUSCH repetitive transmission. For the PUSCH repetitive transmission corresponding to the PUSCH repetition type A, the number of repetitions for the PUSCH repetitive transmission may be determined based on the value of the higher layer parameter numberOfRepetitions. In the PUSCH repetition type A, in a case that the resource assignment table includes numberOfRepetitions for the PUSCH on which transmission is indicated by the DCI format with the CRC scrambled by any one of C-RNTI, MCS-C-RNTI, and CS-RNTI, the number of repetitions may be equal to numberOfRepetitions. In a case that one PUSCH-TimeDomainResourceAllocation includes one or multiple PUSCH-Allocations, the higher layer parameter numberOfRepetitions may be configured for each PUSCH-Allocation. In addition, PUSCH-TimeDomainResourceAllocation may be referred to as a resource assignment table.

The higher layer parameter pusch-AggregationFactor may be a parameter indicating the number of repetitions for PUSCH repetitive transmission. In the PUSCH repetitive transmission corresponding to the PUSCH repetition type A, the number of repetitions for the PUSCH repetitive transmission may be determined based on the value of the higher layer parameter pusch-AggregationFactor. In the PUSCH repetition type A, in a case that pusch-AggregationFactor is configured for the PUSCH on which transmission is indicated by the DCI format with the CRC scrambled by any one of C-RNTI, MCS-C-RNTI, and CS-RNTI, the number of repetitions may be equal to pusch-AggregationFactor. pusch-AggregationFactor may be configured for PUSCH-Config.

The number of repetitions corresponding to the PUSCH repetition type A may be the number of slots for PUSCH repetitive transmission. In addition, one TB may be repeated in one or multiple slots. Assignment of the same OFDM symbol may be applied to PUSCH repetitions transmitted in different slots.

The PUSCH repetition transmission corresponding to the PUSCH repetition type B may be based on a Nominal Repetition and an Actual Repetition.

A frequency hopping scheme may be configured by a higher layer parameter. The higher layer parameters frequencyHopping, frequencyHoppingDCI-0-1, and frequencyHoppingDCI-0-2 may be parameters providing frequency hopping schemes for the PUSCH. For example, the frequency hopping scheme corresponding to the frequency hopping for the PUSCH may be configured by frequencyHoppingDCI-0-2 in PUSCH-Config. In addition, the frequency hopping scheme corresponding to the frequency hopping for the PUSCH may be configured by frequencyHopping in PUSCH-Config. In addition, the frequency hopping scheme corresponding to the frequency hopping for PUSCH transmission configured by frequencyHopping in configuredGrantConfig may be configured. The frequency hopping scheme may be any one of intra-slot frequency hopping, inter-slot frequency hopping, and inter-repetition frequency hopping. In addition, the frequency hopping interval corresponding to intra-slot frequency hopping may be one slot or less. The frequency hopping interval corresponding to inter-slot frequency hopping may be one slot or multiple slots. The frequency hopping interval corresponding to inter-repetition frequency hopping may be based on the nominal repetition.

For example, the hopping interval may be provided by a higher layer parameter. For example, the higher layer parameter may be a dedicated higher layer parameter.

Whether to perform frequency hopping may be determined based at least on DCI. Whether to apply frequency hopping for the PUSCH on which transmission is indicated by the DCI format may be determined based at least on the value of a frequency hopping flag field included in the DCI format. Whether to apply frequency hopping for the PUSCH on which transmission is indicated by a random access response grant may be determined based at least on the value of the frequency hopping flag field included in the random access response grant. For example, the frequency hopping for the PUSCH may be performed based at least on the value of the frequency hopping flag field being 1.

offset offset The intra-slot frequency hopping may be applied to PUSCH transmission in one or multiple slots. For example, the intra-slot frequency hopping may be applied to PUSCH repetitive transmission. For the PUSCH to which the intra-slot frequency hopping is applied, mapping may be switched for every one or multiple OFDM symbols. For example, for the PUSCH to which the intra-slot frequency hopping is applied, switching may be performed for every one or multiple OFDM symbols to determine whether mapping of a resource block corresponds to a first hop or a second hop. In addition, in a case that intra-slot frequency hopping is performed for the PUSCH, switching between the first hop and the second hop may be performed for every one or multiple OFDM symbols. RBmay be a difference of between the position in the first resource block of the first hop and the position of the first resource block in the second hop. RBmay be configured by a higher layer parameter. The one or multiple OFDM symbols may be one slot or less. The one or multiple OFDM symbols may be half the number of OFDM symbols for the PUSCH in one slot. The intra-slot frequency hopping may be applied to the PUSCH corresponding to the PUSCH repetition type A.

μ μ s, f s, f The inter-slot frequency hopping may be applied to PUSCH transmission in multiple slots. For the PUSCH to which inter-slot frequency hopping is applied, mapping of resource blocks may be switched for each slot. For example, inter-slot frequency hopping may be applied to the PUSCH repetitive transmission. In addition, in a case that inter-slot frequency hopping is performed for the PUSCH, switching may be performed for every slot to determine whether the mapping of the resource blocks corresponds to the first hop or the second hop. For example, in a case that a certain slot has a slot index nthat is even-numbered, PUSCH transmission in the slot may correspond to the first hop. For example, in a case that a certain slot has a slot index nthat is odd-numbered, PUSCH transmission in the slot may correspond to the second hop. Inter-slot frequency hopping may be applied to the PUSCH corresponding to either of the PUSCH repetition type A and the PUSCH repetition type B.

Inter-repetition frequency hopping may be applied to the PUSCH corresponding to the PUSCH repetition type B. For the PUSCH to which the inter-repetition frequency hopping is applied, switching between the first hop and the second hop may be performed based on nominal repetition.

1 1 1 At least two transmission schemes may be supported for the PUSCH. For example, codebook-based transmission may be one of the transmission schemes for the PUSCH. For example, non-codebook-based transmission may be one of the transmission schemes for the PUSCH. A higher layer parameter may provide one of codebook-based transmission and non-codebook-based transmission. For example, in a case that “codebook” is set for the higher layer parameter, the terminal apparatusmay be configured with codebook-based transmission. For example, in a case that “nonCodebook” is set for the higher layer parameter, the terminal apparatusmay be configured with non-codebook-based transmission. The higher layer parameter may be txConfig. The higher layer parameter may be usage. For example, in a case that the higher layer parameter is not configured, the terminal apparatusmay not expect scheduling to be performed in either of the DCI format 0_1 and the DCI format 0_2. In a case that the PUSCH is scheduled in the DCI format 0_0, transmission of the PUSCH may be performed based at least on one antenna port.

1 In codebook-based transmission, the PUSCH may be scheduled in a DCI format. The DCI format may be any one of the DCI format 00, the DCI format 0_1, and the DCI format 0_2. In codebook-based transmission, the PUSCH is configured to be transmitted semi-statically. The terminal apparatusmay determine one or multiple precoders for PUSCH transmission. For example, the precoder may be determined based at least on some or all of an SRS resource indicator (SRI), a transmitted precoding matrix indicator (TPMI), and a transmission rank (or rank). For example, the SRI may be provided by a DCI field of one or two SRS resource indicators. For example, the TPMI may be provided by a DCI field of one or two pieces of precoding information. For example, the transmission rank may be provided by a DCI field of the number of layers (the number of transmission layers). For example, the TPMI and the transmission rank may be provided by a DCI field of one or two pieces of “Precoding information and the number of layers”. The SRI may be provided by a first higher layer parameter. The TPMI and the transmission rank may be provided by a second higher layer parameter. The first higher layer parameter may be srs-ResourceIndicator or srs-ResourceIndicator2. The second higher layer parameter may be precodingAndNumberOfLayers or precodingAndNumberOfLayers2.

An SRS resource set applied to the PUSCH may be determined based on the higher layer parameter. The PUSCH may be scheduled by the DCI format 0_1 or the DCI format 0_2. The higher layer parameter may be srs-ResourceSetToAddModList or srs-ResourceSetToAddModeListDCI-0-2. The higher layer parameter may be a higher layer parameter configured in SRS-Config.

In a case that “codebook” is set for the higher layer parameter usage, one or two SRS resource sets may be configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2. The higher layer parameter usage may be configured in the higher layer parameter SRS-ResourceSet.

1 In a case that one SRS resource set is configured, the SRI and the TPMI may be given by the DCI field. The DCI field may include a DCI field of one SRS resource indicator and a DCI field of one piece of “precoding information and number of layers”. The TPMI may be used to indicate a precoder. The precoder may be applied across v layers {0, . . . , v−1}. In a case that multiple SRS resources are configured, one SRS resource may be selected by the SRI. The precoder may correspond to one SRS resource. A transmission precoder (precoder) may be selected from a codebook (uplink codebook). For example, the codebook may have the number of antenna ports. The number of antenna ports may be the same as the higher layer parameter nrofSRS-Ports. In a case that “codebook” is set for the higher layer parameter txConfig, the terminal apparatusmay be configured with at least one SRS resource. The indicated SRI may relate to transmission of the SRS resource identified by the SRI. For example, the indicated SRI may relate to recent transmission of the SRS resource identified by the SRI, and the SRS resource may precede the PDCCH carrying the SRI.

1 1 1 1 In a case that two SRS resource sets are configured, one or two SRIs and one or two TPMIs may be given by the DCI field. For example, the DCI field may include one or both of a DCI field of the SRS resource indicator and a DCI field of “precoding information and number of layers”. The terminal apparatusmay apply the indicated SRI and TPMI to one or multiple PUSCH repetitions. For example, in accordance with the SRS resource set of the PUSCH repetition, the terminal apparatusmay apply the indicated SRI and TPMI to one or multiple PUSCH repetitions. Each TPMI may be used to indicate the precoder based on a code point for SRS resource set indication. The precoder may be applied to the 0th layer to (v−1)-th layer. The precoder may correspond to the SRS resource selected by the SRI. Multiple SRS resources may be configured for an applicable SRS resource set. For example, in a case that multiple SRS resources are configured for the applied SRS resource set, the precoder may correspond to the SRS resource selected by the corresponding SRI. For one or two TPMIs, a transmission precoder (precoder) may be selected from a codebook (uplink codebook). In a case that two SRIs are indicated, the terminal apparatusmay expect the numbers of antenna ports for the indicated two SRS resources to be equal. The number of antenna ports may be provided by a higher layer parameter. In a case that two SRS resources are configured and the higher layer parameter usage is set to ‘codebook’, the terminal apparatusmay not expect that different numbers of SRS resources are configured in the two SRS resource sets.

1 In codebook-based transmission, the terminal apparatusmay determine a codebook subset. For example, the codebook subset may be determined based at least on a TPMI. The codebook subset may be determined in response to reception of a certain higher layer parameter. The certain higher layer parameter may be codebookSubset or codebookSubsetDCI-0-2. Any of ‘fullyAndPartialAndNonCoherent’, ‘partialAndNonCoherent’, and ‘nonCoherent’ may be set for the certain higher layer parameter. In a case that the higher layer parameter ul-FullPowerTrasmission is set to ‘fullpowerMode2’, a certain higher layer parameter is set to ‘AndNonCoherent’, and the SRS resource set for the codebook includes at least one SRS resource with four ports and at least one SRS resource with two ports, the codebook subset associated with the two-port SRS resource (SRS resource with two ports) may be ‘nonCoherent’. The maximum transmission rank (or maximum rank) may be configured for the PUSCH by a higher layer parameter maxRank or a higher layer parameter maxRankDCI-0-2.

1 1 1 The terminal apparatusmay report the UE capability. In a case that the terminal apparatusreports the UE capability of ‘partialAndNonCoherent’ transmission, the terminal apparatusmay not expect the codebook subset with ‘fullyAndPartialAndNonCoherent’ to be configured.

1 1 In a case that the terminal apparatusreports the UE capability of the ‘nonCoherent’ transmission, the terminal apparatusneed not expect that the codebook subset with ‘fullyAndPartialAndNonCoherent’ or ‘partialAndNonCoherent’ is configured.

1 In a case that the higher layer parameter for the codebook nrofSRS-Ports indicates that the maximum number of configured SRS antenna ports is 2, the terminal apparatusmay not expect that the higher layer parameter with ‘partialAndNonCoherent’ set therefor is configured. The higher layer parameter may be codebookSubset or codebookSubsetForDCI-Format0-2. The number of antenna ports may be determined by the higher layer parameter nrofSRS-Ports.

1 For codebook-based transmission, one SRS resource may be determined based on the SRI from the SRS resource set. Except the case that a first higher layer parameter is set to “fullpowerMode2”, the maximum number of configured SRS resources for codebook-based transmission may be 2. The first higher layer parameter may be ul-FullPowerTransmission. The DCI may indicate transmission of the SRS resource. For example, in a case that an aperiodic SRS is configured, the SRS request field in the DCI may indicate (trigger) transmission of an aperiodic SRS resource. The terminal apparatusmay not expect that the first higher layer parameter for which “fullpowerMode” is set and the second higher layer parameter for which “fullAndPartialAndNonCoherent” is set are configured.

1 The terminal apparatusmay transmit the PUSCH by using the same antenna ports as one or multiple SRS ports (antenna ports) in the SRS resource indicated by the DCI format or the higher layer parameter. For example, the SRS ports may be the same as the antenna ports for PUSCH transmission. A DMRS antenna port may be determined according to ordering of a DMRS port.

1 In a case that multiple SRS resources are configured by the SRS resource set, the terminal apparatusmay expect that the higher layer parameter nrofSRS-Ports that has the same value is configured for these SRS resources. The SRS resource set may be the higher layer parameter SRS-ResourceSet with the higher layer parameter usage for which “codebook” is set.

In a case that the higher layer parameter is set to ‘fullpowerMode2’, one or multiple SRS resources with the same number of SRS ports or different numbers of SRS ports may be configured in the SRS resource set for the codebook. In a case that the higher layer parameter is set to ‘fullpowerMode2’ and multiple SRS resource sets are configured in the SRS resource set, up to two different spatial relations may be configured for all SRS resources in the SRS resource set for the codebook. In a case that the higher layer parameter is set to ‘fullpowerMode2’, up to two or four SRS resources may be configured in the SRS resource set for the codebook. In addition, up to eight SRS resources may be configured in one SRS resource set. The SRS resource set for the codebook may be an SRS resource set with the higher layer parameter usage set to ‘codebook’.

1 For non-codebook-based transmission, the PUSCH may be scheduled by the DCI format 0_0, the DCI format 0_1, or the DCI format 0_2. For the non-codebook-based transmission, the PUSCH may be configured semi-statically. The terminal apparatusmay determine the precoder and the transmission rank of the PUSCH based on the SRI. For example, in a case that multiple SRS resources are configured, the SRI may be given by one or two SRS resource indications in the DCI. For example, the SRI may be given by the higher layer parameter. The SRS resource set applied to the PUSCH may be defined by an entry of the higher layer parameter. The higher layer parameter may be srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2.

1 The terminal apparatusmay use one or multiple SRS resources for SRS transmission.

3 The maximum number of SRS resources in one SRS resource set may be transmitted to the base station apparatusas UE capability. SRS resources may be configured for simultaneous transmission in the same OFDM symbol. In one SRS resource set, may be the maximum number of SRS resources configured for simultaneous transmission in the same OFDM symbol, the maximum number of SRS resources, and UE capability. Multiple SRS resources transmitted at the same time may occupy the same resource block. One SRS port may be configured in each SRS resource. One or two SRS resource sets may be configured in the higher layer parameter srs-ResourceSetToAddModList with the higher layer parameter usage set to ‘nonCodebook’ in the higher layer parameter SRS-ResourceSet. In a case that two SRS resource sets are configured, one or two SRIs may be given by the DCI field. The DCI field may be a DCI field of two SRS resource indications.

1 1 1 The terminal apparatusmay apply the indicated SRI to one or multiple PUSCH repetitions. For example, in accordance with the SRS resource set of the PUSCH repetition, the terminal apparatusmay apply the indicated SRI to one or multiple PUSCH repetitions. The maximum number of SRS resources per SRS resource set configured for non-codebook-based transmission may be 4. The maximum number of SRS resources per SRS resource set configured for non-codebook-based transmission may be 8. Each of the indicated one or two SRIs may be associated with the latest transmission of an SRS resource in the SRS resource set identified by the SRI. The SRS transmission may be before the PDCCH carrying the SRI. The terminal apparatusmay not expect that the different numbers of SRS resources are configured in the two SRS resource sets.

In a case that multiple PDCCH candidates (PDCCH candidate(s)) are associated with a search space set configured by a higher layer parameter, one PDCCH candidate is used. The one PDCCH candidate may be one of two PDCCH candidates that starts earlier. The higher layer parameter may be a searchSpaceLinking.

For non-codebook-based transmission, the UE may calculate a precoder. For example, a precoder used for SRS transmission may be calculated based on measurement of an NZP CSI-RS resource. One NZP CSI-RS resource may be configured for the SRS resource set for the non-codebook. For example, the SRS resource set for the non-codebook may be an SRS resource set with the higher layer parameter set to ‘nonCodebook’.

1 1 In a case that an aperiodic SRS resource set is configured, the NZP-CSI RS may be indicated through the SRS request field. The SRS request field may be one of the DCI fields in any one of the DCI format 0_1, the DCI format 02, the DCI format 1_1, and the DCI format 1_2. The first higher layer parameter may indicate an association between an aperiodic SRStriggerting state (SRS) and an SRS resource set. The first higher layer parameter, a triggered SRS resource, srs-ResourceSetld, and csi-RS may be configured in the higher layer parameter SRS-ResourceSet. The higher layer parameter csi-RS may indicate NZP-CSI-RS-ResourceId. The higher layer parameter SRS-ResourceSet associated with the SRS request may be defined by an entry in a list that is a higher layer parameter. The list that is a higher layer parameter may be the higher layer parameter srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2. The terminal apparatusmay not expect to update the precoding information (SRS precoding information). For example, in a case that the gap between the last OFDM symbol in reception of the aperiodic NZP-CSI-RS resource and an initial OFDM symbol in transmission of the aperiodic SRS is equal to or less than the 42 OFDM symbols, the terminal apparatusmay not expect to update the precoding information.

In a case that the aperiodic SRS associated with the aperiodic NZP CSI-RS resource is configured, the presence of the associated CSI-RS may be indicated by the SRS request field. In a case that the value of the SRS request field is not ‘00’ and the scheduling DCI is not used for cross carrier scheduling or cross BWP scheduling (cross bandwidth part scheduling), the presence of the CSI-RS may be indicated by the SRS request field.

In a case that a periodic or semi-persistent SRS resource set is configured, the NZP-CSI-RS-ResourceId for measurement may be indicated through a higher layer parameter associatedCSI-RS.

1 1 The terminal apparatusmay perform one-to-one mapping. The one-to-one mapping may include mapping from the SRI to the DMRS port and mapping from the SRI to the corresponding PUSCH layer {0, . . . , v−1}. The 0th to a (v−1)-th PUSCH layers may be provided. v may be the number of layers. The number of layers may be configured by the higher layer parameter. The terminal apparatusmay transmit the PUSCH by using the same antenna port as the SRS port. For example, the SRS port in the SRS resource indicated by the SRI may be indexed as pi=1000+i. For example, the SRS port in the (i+1)-th SRS resource may be pi. In addition, the SRS port in the (i+1)-th SRS resource may also be indexed as pi. pi may be 1000+i.

1 1 In non-codebook-based transmission, the terminal apparatusmay not expect both spatial relation information (info) for the SRS resource and the higher layer parameter associatedCSI-RS in the higher layer parameter SRS-ResourceSet for the SRS resource set to be configured. The spatial relation information may be determined by a higher layer parameter. The spatial relation information may be a higher layer parameter spatialRelationInfo. In the non-codebook-based transmission, in a case that at least one SRS resource is configured in the SRS resource set with the higher layer parameter set to “nonCodebook”, the terminal apparatusmay be scheduled by the DCI format 0_1 or the DCI format 0_2.

One or multiple Sounding Reference Signal resource sets (SRS resource sets) may be configured by the first higher layer parameter. The first higher layer parameter may be SRS-ResourceSet or SRS-PosResourceSet. In each SRS resource set, K SRS resources may be configured. K may be an integer of 1 or more. The maximum value of K may be indicated by the UE capability. The maximum value of K may be 16. The adaptability of the SRS resource set may be configured in a second higher layer parameter. The second higher layer parameter may be usage. For example, in a case that the second higher layer parameter is set to ‘beamManagement’, then in a given time instance, one SRS resource may be transmitted in each of the one or multiple SRS resource sets. Multiple SRS resources in different SRS resource sets may be transmitted simultaneously. For example, in different SRS resource sets of the same BWP, multiple SRS resources with the same time domain behaviour may be transmitted simultaneously.

For the aperiodic SRS, at least one DCI field may be used to select at least one from the configured SRS resource sets.

The one or multiple SRS parameters may be configured by the first higher layer parameter. For example, the one or multiple SRS parameters may be semi-statically configured by the second higher layer parameter. The first higher layer parameter may be SRS-Resource or SRS-PosResource. The second higher layer parameter may determine an SRS resource configuration identity (ID). The second higher layer parameter may be srs-Resourceld or SRS-PosResourceId. The one or multiple SRS parameters may include some or all of the first higher layer parameter to the twentieth higher layer parameter. The one or multiple SRS parameters may include parameters having the same functions as those of some or all of the first higher layer parameter to the twentieth higher layer parameter. The one or multiple SRS parameters may be determined based on the DCI format.

SRS ap The number Nof SRS ports may be determined by a third higher layer parameter. The third higher layer parameter may be nrofSRS-Ports. The SRS port may be an antenna port. For example, the SRS port may be an antenna port for the SRS. A time domain behaviour of the SRS resource configuration may be determined according to a fourth higher layer parameter. The fourth higher layer parameter may be resourceType. For example, the time domain behaviour may be any one of periodic, semi-persistent, and aperiodic. The period and offset may be determined by a fifth higher layer parameter. The period and offset may be at a slot level. The period and offset may be defined for a periodic SRS resource or a semi-persistent SRS resource.

The fifth higher layer parameter may be periodicityAndOffset-p or periodicityAndOffset-sp. For example, multiple SRS resources with different periodicities need not be expected to be configured in the same SRS resource set. In a case that the fourth higher layer parameter is set to ‘aperiodic’, the slot level offset may be defined by a sixth higher layer parameter. The sixth higher layer parameter may be slotOffset. In a case that the fourth higher layer parameter is set to ‘aperiodic’, a list of available slot offset values may be defined by a seventh higher layer parameter. The seventh higher layer parameter may be AvailableSlotOffset. The list of available slot offset values may be a list of different available slot offset values of 0 to 4. In a case that the reference slot is n+k, then the available slot offset may be the offset from the n+k slot to a certain slot. In the certain slot, an aperiodic SRS resource set may be transmitted. A slot n may be the slot of a triggering DCI. The triggering DCI may trigger transmission of the aperiodic SRS. A slot k may be determined by a sixth higher layer parameter. The seventh higher layer parameter may be configured by up to four values. For an aperiodic SRS resource set, the slot-level offset may be defined by the sixth higher layer parameter for each SRS resource.

SRS symb fac SRS SRS SRS Further, an eighth higher layer parameter may be used to define the number of OFDM symbols N(the number of continuous OFDM symbols) in the SRS resource and a starting OFDM symbol (the starting position in the time domain) of the SRS resource. The eighth higher layer parameter may be resourceMapping. The number of repetitions (repetition factor) Rmay be configured by the eighth higher layer parameter. In a case that the number of repetitions is not configured by the eighth higher layer parameter, the number of repetitions may be the same as the number of OFDM symbols in the SRS resource. Band Ccorresponding to the SRS bandwidth may be defined by a ninth higher layer parameter. In a case that the ninth higher layer parameter is not configured, Bmay be 0. The ninth higher layer parameter may be freqHopping. A partial frequency sounding factor and a starting resource block index for partial frequency sounding may be defined by a tenth higher layer parameter. The tenth higher layer parameter may be FreqScalingFactor and StartRBIndex. A frequency domain position may be defined by an eleventh higher layer parameter. A configurable shift may be configured by a twelfth higher layer parameter. The eleventh higher layer parameter may be freqDomainPosition. The twelfth higher layer parameter may be freqDomainShift.

The first number of OFDM symbols may be configured by the eighth higher layer parameter. The second number of OFDM symbols may be determined based on the DCI format. In a case that the first number of OFDM symbols is configured and the second number of OFDM symbols is provided, the number of OFDM symbols in the SRS resource may correspond to the second number of OFDM symbols.

The first number of repetitions may be configured by the eighth higher layer parameter. The second number of repetitions may be based on the DCI format. In a case that the first number of repetitions is configured and the second number of repetitions is determined, the second number of repetitions may be used, and the first number of repetitions need not be used.

Further, the number of combs (number of transmission combs) may be defined by a thirteenth higher layer parameter. The thirteenth higher layer parameter may be transmissionComb. The number of combs may be any one of 2, 4, 8, and 16. The cyclic shift (initial cyclic shift value) may be defined by a fourteenth higher layer parameter. The fourteenth higher layer parameter may be any one of cyclicShift-n2, cyclicShift-n4, cyclicShift-n8, and cyclicShift-n16. The fourteenth higher layer parameter may be included in the thirteenth higher layer parameter. A comb offset (transmission comb offset) may be defined by a fifteenth higher layer parameter. The fifteenth higher layer parameter may be any one of combOffset n2, combOffset n4, combOffset n8, and combOffset n16. The fifteenth higher layer parameter may be included in the thirteenth higher layer parameter. An SRS sequence ID may be defined by a sixteenth higher layer parameter. The sixteenth higher layer parameter may be sequenceld.

A first cyclic shift (or initial cyclic shift value) may be configured by the fourteenth higher layer parameter. A second cyclic shift (or initial cyclic shift value) may be determined based on the DCI format. In a case that the first initial cyclic shift value is configured set and in a case that the second initial cyclic shift value is determined, the second initial cyclic shift value may be used and the first initial cyclic shift value may not be used. In a case that the first initial cyclic shift value is configured and the second initial cyclic shift value is determined, the sum of the first initial cyclic shift value and the second initial cyclic shift value may be used.

A third cyclic shift (or initial cyclic shift value) may be determined based on one or multiple values. One of one or multiple values may be the number of OFDM symbols in the SRS resource (the number of OFDM symbols constituting the SRS resource). One of the one or multiple values may be the number of repetitions (the number of repetitions for the SRS). One of the one or multiple values may be a maximum number of cyclic shifts. That is, the third cyclic shift (or initial cyclic shift value) may be determined based on some or all of the number of OFDM symbols in the SRS resource, the number of repetitions, and the maximum number of cyclic shifts.

In a case that the first initial cyclic shift value is configured and the third initial cyclic shift value is determined, the third initial cyclic shift value may be used and the first initial cyclic shift value may not be used. In a case that the first initial cyclic shift value is configured and the third initial cyclic shift value is determined, the sum of the first initial cyclic shift value and the third initial cyclic shift value may be used.

A first SRS sequence ID may be configured by a sixteenth higher layer parameter. A second SRS sequence ID may be determined based on the DCI format. In a case that the first SRS sequence ID is configured and the second SRS sequence ID is determined, the second SRS sequence ID may be used and the first SRS sequence ID may not be used. In a case that the first SRS sequence ID is configured and the second SRS sequence ID is determined, the sum of the first SRS sequence ID and the second SRS sequence ID may be used.

The third SRS sequence ID may be determined based on some or all of the number of OFDM symbols in the SRS resource, the number of repetitions, and the maximum number of cyclic shifts. In a case that the first SRS sequence ID is configured and the third SRS sequence ID is determined, the third SRS sequence ID may be used and the first SRS sequence ID may not be used. In a case that the first SRS sequence ID is configured and the third SRS sequence ID is determined, the sum of the first SRS sequence ID and the third SRS sequence ID may be used.

Further, the spatial relation between the reference signal (RS) and the SRS may be defined by a seventeenth higher layer parameter. For example, the spatial relation between the reference reference signal (referenceRS) and a target SRS may be configured by the seventeenth higher layer parameter. The seventeenth higher layer parameter may be spatialRelationInfo or spatialRelationInfoPos. The configuration of the spatial relation may include the ID of the reference signal (reference reference signal). The reference signal may be an SS/PBCH block.

The reference signal may be the CSI-RS. The reference signal may be a certain SRS. In one serving cell, the reference signal may be configured. For example, one serving cell may be indicated by an eighteenth higher layer parameter. The certain SRS may be configured for one BWP in one serving cell. For example, the one serving cell may be the same serving cell as the target SRS. For example, the one BWP may be configured by a nineteenth higher layer parameter. The eighteenth higher layer parameter may be servingCellld. The nineteenth higher layer parameter may be uplinkBWP. The one or multiple SRS parameters may be configured by the first higher layer parameter. For example, the first higher layer parameter may be SRS-Resource or SRS-PosResource.

In a case that the twentieth higher layer parameter is not configured, the number of combs may be any one of 2, 4, and 8. In a case that the twentieth higher layer parameter is configured, the number of combs may be any one of 2, 4, 8, and 16. In a case that the twentieth higher layer parameter is not configured, the fourteenth higher layer parameter may be any one of cyclicShift-n2, cyclicShift-n4 and cyclicShift-n8. In a case that the twentieth higher layer parameter is configured, the fourteenth higher layer parameter may be any one of cyclicShift-n2, cyclicShift-n4, cyclicShift-n8, and cyclicShift-n16.

The one or multiple SRS parameters may include some or all of the second higher layer parameter to the twentieth higher layer parameter. The fact that the SRS is transmitted may mean that the SRS resource is transmitted. The fact that the SRS is transmitted may mean that the SRS resource set is transmitted. The SRS transmission may be SRS resource transmission. The SRS transmission may be SRS resource set transmission.

SRS SRS SRS SRS SRS SRS SRS SRS SRS SRS SRS SRS SRS SRS SRS symb symb symb ap ap ap symb symb ap symb ap, 1 ap, 2 ap ap, 1 ap, 2 The SRS resource may occupy one or multiple OFDM symbols. For example, the SRS resource may occupy NOFDM symbols among the last six OFDM symbols of one slot. For example, Nmay be any one of 1, 2, and 4. For example, the SRS resource may occupy any one of the OFDM symbol positions in one slot. For example, the SRS resource may occupy Nadjacent OFDM symbols in one slot. The Nantenna ports may be mapped to each OFDM symbol of the resource. Nmay be 4 or 8. For example, Nantenna ports of the SRS resource may be mapped to each OFDM symbol of the resource. Nmay be any one of 1, 2, 4, 8, and 12. Nmay be any one of 1, 2, 4, 8, 10, 12, and 14. In a case that Nis 8, Nmay be an even number. For example, Nantenna ports may be mapped to slots with even-numbered slot indices. For example, Nantenna ports may be mapped to slots with odd-numbered slot indices. Nmay be N+N.

In a case that the PUSCH and the SRS are transmitted in the same slot, the transmission may be configured in such a manner that the SRS is transmitted after the PUSCH is transmitted. For example, in a case that the PUSCH and the SRS are transmitted in one slot in one serving cell, the transmission may be configured in such a manner that the SRS is transmitted after the transmission of the DMRS corresponding to the PUSCH.

SRS SRS ap ap In a case that a PUSCH transmission or a PUCCH transmission overlaps with an SRS transmission, the SRS need not be transmitted in the overlapping OFDM symbols. For example, in one serving cell, in a case that the PUSCH transmission or the PUCCH transmission overlaps with the SRS transmission in the time domain, the SRS need not be transmitted in the overlapping OFDM symbols. In a case that the PUSCH transmission or the PUCCH transmission overlaps with the SRS transmission, the SRS need not be transmitted. For example, in a case that Nis 8 and in a case that the PUSCH transmission or the PUCCH transmission overlaps with the SRS, the SRS need not be transmitted. For example, in a case that Nis 8 and in a case that the PUSCH transmission or the PUCCH transmission overlaps with the SRS, the SRS need not be transmitted in the overlapping OFDM symbol sets. The OFDM symbol set may include two OFDM symbols.

In a case that the higher layer parameter resourceType is set to ‘periodic’, a target SRS resource (SRS resource) with one spatial domain transmission filter may be transmitted. In a case that a certain higher layer parameter includes one ID, the target SRS resource with one spatial domain filter may be transmitted. The one spatial domain filter may be used for reception or transmission of the reference reference signal (reference signal). The reference reference signal may be an SS/PBCH block, a CSI-RS, or a certain SRS. For example, in a case that a higher layer parameter includes the ID of any one of ‘ssb-Index’, ‘ssb-IndexServing’, and ‘ssb-IndexNcell’, the reference reference signal may be an SS/PBCH block. For example, in a case that a certain higher layer parameter includes the ID of either of ‘csi-RS-Index’ or ‘csi-RS-IndexServing’, the reference reference signal may be a periodic CSI-RS or a semi-persistent CSI-RS. For example, in a case that the certain higher layer parameter includes the ID of either of ‘srs’ and ‘srs-spatialRelation’, the reference reference signal may be a periodic SRS. The reference reference signal may be a DL PRS.

subframe, μ slot In a case that the higher layer parameter resourceType is set to ‘semi-persistent’, the SRS transmission may start from the first slot after the first slot (n+3Nslot). For example, in the first slot, an assumption for the SRS transmission may start to be applied. Slot n may be the slot in which the PUCCH is transmitted. For example, the PUCCH may carry HARQ-ACK information corresponding to the PDSCH carrying an activation command. In other words, in a case that the activation command is received, the SRS transmission may be started from the first slot. In a case that the activation command is received, the assumption for the SRS transmission may start to be applied in the first slot. The activation command may include an assumption for a spatial relationship (or a spatial relationship). The assumption for the spatial relationship may be provided by a list. The list may be a list of reference signal IDs. For example, each of the reference signal IDs may refer to any one of an SS/PBCH block, a NZPCSI-RS resource, and an SRS resource. The NZP CSI-RS resource may be configured in one serving cell. The SRS resource may be configured in one serving cell and one uplink BWP. For example, one serving cell may be indicated by a first field in the activation command. For example, one uplink BWP may be indicated by the second field in the activation command. The first field may be a Resource Serving Cell ID field. The second field may be a Resource BWP ID field. For example, one serving cell may be the same serving cell as the SRS resource set. For example, one uplink BWP may be the same uplink BWP as the SRS resource set.

In a case that one SRS resource in the activated SRS resource set (resource set) is configured by the higher layer parameter, the ID of a first reference signal in the activation command may be assumed to overwrite the ID of a second reference signal in the higher layer parameter. The higher layer parameter may be spatialRelationInfo or spatialRelationInfoPos.

In a case that a deactivation command is received and in a case that the PUCCH is transmitted in slot n, stoppage of the SRS transmission may start to be applied in the first slot.

subframe, μ slot The deactivation command may be carried by the PDSCH. The PUCCH may include HARQ-ACK information corresponding to the PDSCH. Stoppage of SRS transmission corresponding to a deactivated SRS resource set may start to be applied in the first slot. The first slot may be a first slot after an n+3Nslot. μ may be an SCS configuration for the PUCCH.

1 1 In a case that the terminal apparatushas an active semi-persistent SRS resource configuration (active semi-persistent SRS resourceconfiguration) and does not receive the deactivation command, the semi-persistent SRS resource configuration may be regarded as active in one uplink BWP. One uplink BWP may be active. In a case that the terminal apparatushas an active semi-persistent SRS resource configuration and receives the deactivation command, the semi-persistent SRS resource configuration may be suspended.

In a case that the higher layer parameter resourceType is set to ‘aperiodic’, some or all of operations 1 to 7 may be applied.

Operation 1 may include receiving one configuration of one or multiple SRS resource sets.

2 switch 2 switch switch Operation 2 may include receiving one command. One command may be one downlink DCI-based command. One command may be one group common DCI-based command. One command may be one uplink DCI-based command. A minimal time interval may be NOFDM symbols and an additional time period T. The minimum time interval may be a minimum time interval from the last OFDM symbol of the PDCCH triggering the aperiodic SRS transmission to the first OFDM symbol of the SRS resource. The minimum time interval may be N+14 OFDM symbols and the additional time period T. The minimum time interval may be determined based at least on the minimum SCS. The minimum SCS may be a minimum SCS among SCSs of the PDCCH, the first uplink carrier, the second uplink carrier, and the SRS. The additional time period Tmay be 0.

Operation 3 may include triggering of an aperiodic SRS with no data and no CSI. For example, the DCI format 0_1 and the DCI format 0_2 may trigger the aperiodic SRS. The aperiodic SRS need not include data or CSI.

1 1 1 In operation 4, the terminal apparatusmay transmit the SRS in each of one or multiple SRS resource sets and in the t+1th available slot. The SRS may be an aperiodic SRS. The one or multiple SRS resource sets may be triggered by the DCI. The DCI triggering the aperiodic SRS may be received in the first slot n. At least one resource set (SRS resource set) may be configured by a higher layer parameter availableSlotOffset. The available slots may be counted from the second slot. The second slot may be determined based on at least the first slot and an offset value (slot k). The offset value may be configured by the second higher layer parameter. The second higher layer parameter may be slotOffset. The second higher layer parameter may be configured for each of the one or multiple SRS resource sets to be triggered. The available slots may be slots that satisfy a condition. The condition may be that a UL symbol or a flexible symbol is present for a time domain position corresponding to multiple SRS resources in one resource set (SRS resource set). The condition may be that a minimum timing requirement UEcapability is satisfied. The minimum timing requirement may be a minimum timing request between a triggering PDCCH and all SRS resources in one resource set. From the first OFDM symbol carrying the DCI of the SRS request to the last OFDM symbol of the triggered SRS resource set, the terminal apparatusneed not expect to receive an SFI indication, a UL cancellation indication, or dynamic scheduling of a downlink channel/signal in the flexible symbol. From the first OFDM symbol carrying the DCI of the SRS request to the last OFDM symbol of the triggered SRS resource set, the terminal apparatusneed not expect to change the determination of the available slot. The t may be configured by a third higher layer parameter. The third higher layer parameter may be an availableSlotOffset. For example, the t may be configured with up to four values for each of the one or multiple SRS resource sets to be triggered. The t may be based on a subcarrier spacing for the SRS transmission to be triggered. In an SRS resource set in which the third higher layer parameter is not configured, the t may be 0.

Operation 5 may include transmission of the SRS in each of the one or multiple SRS resource sets and in the first slot. The SRS may be an aperiodic SRS. The DCI triggering the aperiodic SRS may be received in slot n. No resource set (SRS resource set) may be configured with the first higher layer parameter. The second higher layer parameter may be configured. The second higher layer parameter may be ca-SlotOffset. The first slot may be determined based at least on slot n and slot k.

Operation 6 may include transmitting the target SRS resource with one spatial domain filter.

subframe, μ slot 1 Operation 7 may include application of update of a spatial relationship for one SRS resource to the SRS transmission. The SRS transmission may be started from the first slot after n+3Nslots. The p may be the SCS configuration for the PUCCH. An update command may be carried by the PDSCH. The HARQ-ACK corresponding to the PDSCH may be transmitted in slot n. One SRS resource may be configured by the higher layer parameter SRS-Resource. The terminal apparatusmay receive the update command (spatial relation update command). The update command may include an assumption for the spatial relationship. The assumption for the spatial relationship may be provided by a list. The list may be a list referring to one or multiple reference signal IDs.

The higher layer parameter resourceType being set to ‘aperiodic’ may indicate that the SRS resource corresponds to an aperiodic SRS (aperiodic). The higher layer parameter resourceType being set to ‘semi-persistent’ may indicate that the SRS resource corresponds to a semi-persistent SRS (semi-persistent). The higher layer parameter resourceType being set to ‘periodic’ may indicate that the SRS resource corresponds to periodic SRS (periodic).

One or multiple SRS resources in one SRS resource set need not be expected to correspond to different time domain behaviors. For example, one or multiple SRS resources in one SRS resource set need not be expected to be configured with different time domain behaviors. SRS resources and associated SRS resource sets need not be expected to be configured with different time domain behaviors.

In one carrier, one or multiple OFDM symbols need not be expected to be configured to overlap between the first SRS resource and the second SRS resource. For example, the first SRS resource may be configured by the higher layer parameter SRS-PosResource. The second SRS resource may be configured by the higher layer parameter SRS-Resource. For both the first SRS resource and the second SRS resource, resourceType may be ‘periodic’.

Transmission of the first SRS need not be expected to be triggered or activated. For example, the first SRS may be an SRS in one or multiple OFDM symbols. The one or multiple OFDM symbols may overlap between the first SRS resource and the second SRS resource. For example, the first SRS resource may be configured by the higher layer parameter SRS-PosResource. The second SRS resource may be configured by the higher layer parameter SRS-Resource. For both the first SRS resource and the second SRS resource, resourceType may be ‘semi-persistent’ or ‘aperiodic’.

In one carrier, multiple OFDM symbols need not be expected to be configured to overlap with multiple SRS resources. The multiple SRS resources may be configured by the higher layer parameter SRS-PosResource in which, for the multiple SRS resources, resourceType is ‘periodic’.

In one carrier, transmission of the SRS in multiple OFDM symbols need not be expected to be triggered or activated. The multiple OFDM symbols may be OFDM symbols overlapping with the multiple SRS resources. The multiple SRS resources may be configured by the higher layer parameter SRS-PosResource in which, for the multiple SRS resources, resourceType is ‘semi-persistent’ or ‘aperiodic’.

1 1 SRS ap For the PUCCH and the SRS in one carrier, the terminal apparatusneed not transmit the SRS in a case that the first SRS is configured. The first SRS may be configured in the same OFDM symbol as the PUCCH. The PUCCH may carry only a CSI report. The PUCCH may carry only an L1-RSRP report. The PUCCH may carry only an L1-SINR report. The terminal apparatusneed not transmit the SRS in a case that transmission of the second SRS is configured or triggered. The second SRS may be either a semi-persistent SRS or a periodic SRS configured to be transmitted in the same OFDM symbol as the PUCCH. The second SRS may be an aperiodic SRS triggered to be transmitted in the same OFDM symbol as the PUCCH. The PUCCH may carry some or all of HARQ-ACK, a link recovery request, and a scheduling request (SR). In a case that the SRS is not transmitted due to overlap with the PUCCH, only SRS symbols overlapping with PUCCH symbols may be dropped. In a case that Nis 8, the SRS symbol overlapping with the PUCCH symbol and the SRS symbol not overlapping with the PUCCH symbol may be dropped. In a case that the aperiodic SRS is triggered to be transmitted to overlap with the PUCCH, the PUCCH need not be transmitted.

1 1 SRS SRS ap ap In a case that one SRS resource corresponding to resourceType set to ‘aperiodic’ is triggered in one or multiple OFDM symbols in which transmission of the periodic or semi-persistent SRS is configured, the terminal apparatusmay transmit the aperiodic SRS resource and the periodic or semi-persistent SRS in the overlapping OFDM symbol may be dropped. The periodic or semi-persistent SRS in the non-overlapping OFDM symbol may be transmitted. In a case that Nis 8, the periodic or semi-persistent SRS in the non-overlapping OFDM symbol may be dropped. Being dropped may include not being transmitted. In a case where the SRS resource corresponding to resourceType set to ‘semi-persistent’ is triggered in one or multiple OFDM symbols in which periodic SRS transmission is configured, the terminal apparatusmay transmit the semi-persistent SRS resource and the periodic SRS in the overlapping OFDM symbol may be dropped. The periodic SRS in the non-overlapping OFDM symbol may be transmitted. In a case that Nis 8, the periodic or semi-persistent SRS in the overlapping OFDM symbol set may be dropped.

In a case that the spatial relationship (spatialRelationlnfo) is activated or updated for the first SRS resource, the spatial relationship may be applied to the second SRS resource. The first SRS resource may be a semi-persistent SRS resource or an aperiodic SRS resource. The second SRS resource may be a semi-persistent SRS resource or an aperiodic SRS resource with a same SRS resource ID. The second SRS resource may be a semi-persistent SRS resource or an aperiodic SRS resource with the same SRS resource ID for all BWPs in the determined multiple CCs. The first SRS resource may be configured by a higher layer parameter. The spatial relationship may be activated or updated by the MAC CE for multiple CCs (component carriers) or/and multiple sets of BWPs. The list of multiple CCs may be determined by the higher layer parameter. The higher layer parameter may be simultaneousSpatial-UpdatedList1 or simultaneousSpatial-UpdatedList2.

SRS SRS SRS SRS ap ap ap ap ap ap ap ap ap ap The number of SRS ports Nmay be 8. For example, Nfor one SRS resource may be 8. Either of time division multiplexing (TDM) based mapping and nonTDM based mapping may be configured for the SRS or the SRS resource. In a case that the TDM-based mapping is configured, the number of OFDM symbols Smay be provided. The TDM-based mapping being configured may be that the number of OFDM symbols Sis provided. The TDM-based mapping being configured may be that Sis greater than or equal to 2. The nonTDM-based mapping being configured may be that Sis 1. In a case that Nis not 8, Smay not be expected to be configured. In the case that Nis not 8, Smay be ignored.

ap ap ap ap ap ap ap ap ap ap ap ap SRS SRS SRS Smay be the number of OFDM symbols to which the SRS ports are mapped. For example, in a case that Sis 1, NSRS ports may be mapped to one OFDM symbol. For example, in a case that Sis 2, NSRS ports may be mapped to two OFDM symbols. For example, in a case that Sis 4, NSRS ports may be mapped to four OFDM symbols. Smay be the same as the number of antenna port groups. For example, in a case that the codebook subset is ‘fullCoherent’, Smay be 1. For example, in a case that the codebook subset is ‘4port-partialCoherent’, Smay be 2. For example, in a case that the codebook subset is ‘2port-partialCoherent’, Smay be 4. In a case that the codebook subset is ‘nonCoherent’, Smay be 1 or 8.

1000 1001 1004 1005 1002 1003 1006 1007 1000 1004 1001 1005 1002 1006 1003 1007 The antenna port group may be a group of antenna ports kept coherent. A distance between antenna port groups may not depend on a wavelength. For example, in a case that the number of antenna port groups is 2, a first antenna port group may include the antenna ports {,,,}. In the case that the number of antenna port groups is 2, a second antenna port group may include the antenna ports {,,,}. For example, in a case that the number of antenna port groups is 4, the first antenna port group may include the antenna ports {,}. In the case that the number of antenna port groups is 4, the second antenna port group may include the antenna ports {,}. In the case that the number of antenna port groups is 4, a third antenna port group may include the antenna ports {,}. In the case that the number of antenna port groups is 4, a fourth antenna port group may include the antenna ports {,}.

SRS ap The codebook subset being ‘fullCoherent’ may be that each layer is mapped to N(for example, 8) antenna ports. The codebook subset being ‘4port-partialCoherent’ may be that each layer is mapped to four antenna ports. The codebook subset being ‘2port-partialCoherent’ may be that each layer is mapped to two antenna ports. The codebook subset being ‘nonCoherent’ may be that each layer is mapped to one antenna port.

ap ap ap ap ap ap 1000 1001 1004 1005 1002 1003 1006 1007 1000 1004 1001 1005 1002 1006 1003 1007 In the case that Sis 2, the antenna ports {,,,} may be mapped to a first OFDM symbol. In the case that Sis 2, the antenna ports {,,,} may be mapped to a second OFDM symbol. In the case that Sis 4, the antenna ports {,} may be mapped to the first OFDM symbol. In the case that Sis 4, the antenna ports {,} may be mapped to the second OFDM symbol. In the case that Sis 4, the antenna ports {,} may be mapped to a third OFDM symbol. In the case that Sis 4, the antenna port {,} may be mapped to the fourth OFDM symbol.

ap ap ap ap ap ap 1000 1001 1002 1003 1004 1005 1006 1007 1000 1001 1002 1003 1004 1005 1006 1007 In the case that Sis 2, the antenna ports {,,,} may be mapped to the first OFDM symbol. In the case that Sis 2, the antenna ports {,,,} may be mapped to the second OFDM symbol. In the case that Sis 4, the antenna ports {,} may be mapped to the first OFDM symbol. In the case that Sis 4, the antenna ports {,} may be mapped to the second OFDM symbol. In the case that Sis 4, the antenna ports {,} may be mapped to the third OFDM symbol. In the case that Sis 4, the antenna port {,} may be mapped to the fourth OFDM symbol.

fac fac fac symb SRS The number of repetitions (repetition factor) Rmay be configured for one SRS resource. The number of repetitions may be configured by the higher layer parameter. The number of repetitions may be any one of 1, 2, and 4. The number of repetitions may be any one of 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, and 14. The number of repetitions Rmay be configured by the higher layer parameter resourceMapping in the higher layer parameter SRS-Resource. The number of repetitions Rmay be determined based on the DCI format. The number of repetitions may be less than or equal to N.

fac symb fac symb symb symb symb fac fac ap ap fac ap ap fac ap ap ap ap ap ap ap SRS SRS SRS SRS SRS SRS The fact that Ris the same as Nmay be that frequency hopping is not configured. The fact that that Ris the same as Nmay be that one of cyclic shift hopping and sequence hopping is not configured or neither of cyclic shift hopping and sequence hopping is configured. Each of the multiple antenna ports of one SRS resource may be mapped to the first set. For example, in a case that frequency hopping is not configured, each of the multiple antenna ports of one SRS resource in each slot may be mapped to the first set in all of the NOFDM symbols. The first set may be a set of one or multiple subcarriers. The first set may be a set of one or multiple subcarriers in the second set. The second set may be a set of one or multiple PRBs. For example, in a case that no frequency hopping is configured within one SRS resource in each slot, each of the multiple antenna ports of one SRS resource in each slot may be mapped to the first set in all of the NOFDM symbols. Nmay be exactly divisible by R. Rmay be exactly divisible by S. X being exactly divisible by Y may be that mod (X, Y) is 0. In a case that Sis used, Rmay be greater than or equal to S. In the case that Sis used, Rmay be exactly divisible by S. The fact that Sis used may be that Sis greater than 1. The fact that Sis used may be that Sis configured by a higher layer parameter. The fact that Sis used may include at least the number of antenna ports Nbeing 8.

ap fac s s s s symb symb s ap s ap s s s s symb s symb s s s s symb s symb symb s ap s ap ap s ap symb s s symb s symb s symb s SRS SRS SRS SRS SRS SRS SRS SRS SRS SRS SRS The product of Sand Rmay be R. For example, Rmay be the number of repetitions for the SRS ports mapped to one OFDM symbol. Rmay be the number of OFDM symbols. Rmay be less than or equal to N. Nmay be R. In a case that Sis greater than 1, Rmay be used. In a case that Sis configured, Rmay be used. In the case that the TDM-based mapping is configured, Rmay be used. In a case that Ris used, Rmay be less than or equal to N. In the case that Ris used, Nmay be R. In the case that Ris used, Rmay not be expected to be 1. The fact that Ris the same as Nmay be that frequency hopping is not configured. The fact that that Ris the same as Nmay be that one of cyclic shift hopping and sequence hopping is not configured or neither of cyclic shift hopping and sequence hopping is configured. For example, in the case that frequency hopping is not configured, each of the multiple antenna ports of one SRS resource in each slot may be mapped to the same set of subcarriers in all of the NOFDM symbols. The fact that Ris the same as Smay be that frequency hopping with no repetition is configured. In a case that Ris the same as S, the multiple antenna ports of one SRS resource (or respective antenna ports) may be mapped to different sets. The different sets may be sets of subcarriers. The different sets may be subcarrier sets in each set of SOFDM symbols (or adjacent OFDM symbols). In a case that Ris greater than Sand Nis greater than 2R, each of the antenna ports of one SRS resource in each slot may be mapped to the same subcarrier set in each set of Radjacent OFDM symbols. The frequency hopping in N/Rsets may follow an SRS hopping parameter. Nmay be exactly divisible by R. That is, a remainder obtained by dividing Nby Rmay be 0.

SRS SRS symb symb One or multiple first antenna ports may correspond to a first cyclic shift (CS) set. For example, in a case that cyclic shift hopping is not configured, each of the one or multiple first antenna ports in each slot may correspond to the first CS set in all of the NOFDM symbols. The first CS set may be a set of cyclic shifts ai corresponding to the one or multiple first antenna ports pi. For example, in a case that no cyclic shift hopping is configured within one SRS resource in each slot, each of the one or multiple first antenna ports in each slot may correspond to the first CS set in all of the NOFDM symbols.

ap Further, in a case that frequency hopping is configured within one SRS resource in each slot and there is no repetition (the number of repetitions is 1 or S), each of the antenna ports of one SRS resource in each slot may be mapped to a different set in each OFDM symbol. The set may be a set of one or multiple subcarriers. The same transmission comb value may be assumed for different sets.

ap ap fac fac symb fac fac ap fac SRS Further, in a case that cyclic shift hopping is configured within one SRS resource in each slot and there is no repetition (the number of repetitions is 1 or S), the one or multiple first antenna ports in each slot may be mapped to different CS sets in each set of Sadjacent OFDM symbols. The CS set may be a set of cyclic shifts ai corresponding to the one or multiple first antenna ports pi. The same transmission comb value may be assumed for different CS sets. In a case that frequency hopping and repetition are configured, each of one or multiple antenna ports of one SRS resource may be mapped to the subcarriers included in the nth subcarrier set in the OFDM symbols included in the nth OFDM symbol set. The nth OFDM symbol set may be a pair of Radjacent OFDM symbols. Rmay be the number of repetitions. The nth subcarrier set may include one or multiple subcarriers. n may be an integer greater than or equal to 1. For example, n may be N/R. In this case, mod (R, S) may be 0. The nth subcarrier set may include one or multiple subcarriers different from those of the subcarrier sets other than the nth subcarrier set. In a case that frequency hopping and repetition are configured within one SRS resource in each slot, each of the antenna ports of one SRS resource in each slot may be mapped to the same subcarrier set within each of the pairs of ROFDM symbols, and frequency hopping between the two pairs may follow the SRS frequency hopping pattern. The fact that the frequency hopping follows the SRS frequency hopping pattern may mean that the frequency hopping is applied, performed, or configured.

s symb s s SRS In a case that frequency hopping and repetition are configured, each of one or multiple antenna ports of one SRS resource may be mapped to the subcarriers included in the nth subcarrier set in the OFDM symbols included in the nth OFDM symbol set. The nth OFDM symbol set may be a pair of Radjacent OFDM symbols. The nth subcarrier set may include one or multiple subcarriers. n may be an integer greater than or equal to 1. For example, n may be N/R. The nth subcarrier set may include one or multiple subcarriers different from those of the subcarrier sets other than the nth subcarrier set. In the case that frequency hopping and repetition are configured within one SRS resource in each slot, each of the antenna ports of one SRS resource in each slot may be mapped to the same subcarrier set within each of the pairs of ROFDM symbols, and frequency hopping between the two pairs may follow the SRS frequency hopping pattern.

fac symb fac fac ap fac SRS In a case that cyclic shift hopping is configured, one or multiple antenna ports (SRS ports) may correspond to the nth cyclic shift in the OFDM symbols included in the nth OFDM symbol set. The nth OFDM symbol set may be a pair of Radjacent OFDM symbols. The nth cyclic shift may be the nth CS set. n may be an integer greater than or equal to 1. For example, the maximum number of n may be N/R. In this case, mod (R, S) may be 0. In a case that cyclic shift hopping and repetition are configured within one SRS resource in each slot, each of the antenna ports of one SRS resource in each slot may correspond to the same cyclic shift within the pair of ROFDM symbols, and cyclic shift hopping between the two pairs may follow a cyclic shift hopping pattern. The fact that cyclic shift hopping follows the cyclic shift hopping pattern may mean that the cyclic shift hopping is applied, performed, or configured. Whether to apply cyclic shift hopping may be configured by a higher layer parameter.

s symb s s SRS In the case that cyclic shift hopping is configured, one or multiple antenna ports (SRS ports) may correspond to the nth cyclic shift in the OFDM symbols included in the nth OFDM symbol set. The nth OFDM symbol set may be a pair of Radjacent OFDM symbols. The nth cyclic shift may be the nth CS set. n may be an integer greater than or equal to 1. For example, the maximum number of n may be N/R. In the case that cyclic shift hopping and repetition are configured within one SRS resource in each slot, each of the antenna ports of one SRS resource in each slot may correspond to the same cyclic shift within the pair of ROFDM symbols, and cyclic shift hopping between the two pairs may follow the cyclic shift hopping pattern.

SRS SRS symb fac symb fac ap In a case that the number of antenna ports is 8, N/Rmay be an even number. In the case that the number of antenna ports is 8, N/Rmay be greater than or equal to 2. In the case that the number of antenna ports is 8 and Sis 2, a first antenna port set and a second antenna port set may be determined. The antenna port set may include four antenna ports. The first subcarrier set to which the first antenna port set is mapped in the first OFDM symbol may be the same as the second subcarrier set to which the second antenna port set is mapped in the second OFDM symbol. The first OFDM symbol may be different from the second OFDM symbol. In the case that the number of antenna ports is 8, cyclic shift hopping may be applied.

SRS SRS SRS symb fac fac ap symb s ap ap For example, each of the antenna ports included in the first antenna port set of one SRS resource may be mapped to the first subcarrier set in the first OFDM symbol included in the first OFDM symbol set. Each of the antenna ports included in the second antenna port set may be mapped to the first subcarrier set in the second OFDM symbol included in the first OFDM symbol set. Each of the antenna ports included in the first antenna port set may be mapped to the second subcarrier set in the first OFDM symbol included in the second OFDM symbol set. Each of the antenna ports included in the second antenna port set may be mapped to the second subcarrier set in the second OFDM symbol included in the second OFDM symbol set. The mapping switching from the first subcarrier set to the second subcarrier set may be referred to as frequency hopping. For example, in the case that the number of antenna ports is 8, frequency hopping may be applied for every N/ROFDM symbols. In this case, mod (R, S) may be 0. For example, in the case that the number of antenna ports is 8, frequency hopping may be applied for every N/ROFDM symbols. The OFDM symbol set may include two or more OFDM symbols. The subcarrier set may include one or multiple subcarriers. The antenna port set may include N/Santenna ports.

For example, in a case that the number of antenna ports is four or less, the first hopping frequency (first SRS hopping pattern) may be applied. In a case that the number of antenna ports is 8, the second hopping frequency (second SRS hopping pattern) may be applied. The first SRS hopping pattern may be different from the second SRS hopping pattern.

fac symb symb fac symb fac fac fac ap fac fac SRS SRS SRS Aperiodic SRS resources with intra-slot frequency hopping within one BWP may be configured. In a case that Ris 1 and frequency hopping is configured, a full hopping bandwidth may be sounded in equal-size subbands across Nsymbols. The full hopping bandwidth may be sounded in equal-size subbands across N/Rsets. Each of N/Rsets may include Radjacent OFDM symbols. In this case, mod (R, S) may be 0. Each of the antenna ports of the SRS resources may be mapped to the same subcarrier set within each OFDM symbol set. The OFDM symbol set may be a pair of Radjacent OFDM symbols. The subcarrier set may be a set of one or multiple subcarriers. The pair of Radjacent OFDM symbols may include resource OFDM symbols.

s symb symb s symb s s s s SRS SRS SRS Aperiodic SRS resources with intra-slot frequency hopping within one BWP may be configured. In a case that Ris 1 and frequency hopping is configured, the full hopping bandwidth may be sounded in equal-size subbands across Nsymbols. The full hopping bandwidth may be sounded in equal-size subbands across N/Rsets. Each of N/Rsets may include Radjacent OFDM symbols. Each of the antenna ports of the SRS resources may be mapped to the same subcarrier set within each OFDM symbol set. The OFDM symbol set may be a pair of Radjacent OFDM symbols. The subcarrier set may be a set of one or multiple subcarriers. The pair of Radjacent OFDM symbols may be resource OFDM symbols.

SRS symb fac fac A periodic or semi-persistent SRS resource with inter-slot hopping or intra-slot hopping within one BWP may be configured. The SRS resource may occupy the same OFDM symbol position in each slot. The SRS resource of N symbols may occupy the same OFDM symbol position in each slot. In a case that Nis 4, Ris 2, and frequency hopping is configured, intra-slot hopping and inter-slot hopping may be supported on each of the multiple antenna ports. The multiple antenna ports may be mapped to different subcarrier sets across the two pairs in each slot. Each of the two pairs may include Radjacent OFDM symbols. Each of the antenna ports of the SRS resources may be mapped to the same subcarrier set within each pair. A first portion of the antenna ports of the SRS resource may be mapped to the first subcarrier set within each pair. A second portion of the antenna ports of the SRS resource may be mapped to the second subcarrier set within each pair.

SRS symb fac A periodic or semi-persistent SRS resource with cyclic shift hopping within one BWP may be configured. The SRS resource may occupy the same OFDM symbol position in each slot. The SRS resource of N symbols may occupy the same OFDM symbol position in each slot. In a case that Nis 4, the number of repetitions is 2, and cyclic shift hopping is configured, then the one or multiple antenna ports may correspond to different CS sets across the two pairs in each slot. Each of the two pairs may include Radjacent OFDM symbols. The one or multiple antenna ports may be mapped to the same CS set within each pair. A first portion of the antenna ports of the SRS resource may be mapped to the first CS set within each pair. A second portion of the antenna ports of the SRS resource may be mapped to the second CS set within each pair.

The SRS resource may be configured by a higher layer parameter. For example, the higher layer parameter may be SRS-Resource. For example, the higher layer parameter may be SRS-PosResource. The number of antenna ports may be determined for the SRS resource. The number of continuous OFDM symbols may be determined for the SRS resource. A time domain starting position may be determined for the SRS resource. A frequency domain starting position may be determined for the SRS resource. The number of combs may be determined for the SRS resource. A maximum number of cyclic shifts may be determined for the SRS resource. The length of an SRS sequence may be determined for the SRS resource.

SRS SRS SRS SRS SRS SRS SRS SRS SRS ap symb 0 0 ap ap ap ap ap ap ap The SRS resource may include one or multiple elements. The one or multiple elements may be some or all of the number of antenna ports N, the number of continuous OFDM symbols N, the time domain starting position l, and the frequency domain starting position k. The number of antenna ports Nmay be the number of antenna ports for the SRS. For example, the number of antenna ports Nmay be provided by the first higher layer parameter. The first higher layer parameter may be nrofSRS-Ports. The number of antenna ports Nmay be any one of 1, 2, 4, and 8. The antenna port pi may be determined based at least on the number of antenna ports N. For example, i may be a value from 0 to N−1, and the antenna port pi may be i+1000. The antenna port pi may be determined based at least on whether the number of antenna ports Nis given by the first higher layer parameter. In a case that the first higher layer parameter is not provided, the number of antenna ports Nmay be 1. The antenna port may be any one of 1000, 1001, 1002, 1003, 1004, 1005, 1006, and 1007.

SRS SRS symb symb The number of continuous OFDM symbols Nmay be any one of 1, 2, 4, 8 and 12. For example, the number of continuous OFDM symbols Nmay be determined by a higher layer parameter. The higher layer parameter may be nrofSymbols. The higher layer parameter may be a higher layer parameter resourceMapping including a field of nrofSymbols.

0 symb offset offset offset offset offset symb slot SRS The time domain starting position lmay be given by N−1−l. The offset lmay be an integer from 0 to 13. The offset lmay be counted backwards from the end of the slot. The offset lmay be determined by a higher layer parameter. The higher layer parameter may be resourceMapping. The higher layer parameter may include a field of startPosition. lmay be greater than or equal to N−1.

(pi) A sounding reference signal sequence (SRS sequence) may be generated. For example, one SRS sequence may be generated for one SRS resource. One SRS sequence r(n, l′) may be generated according to some or all of Math. 1, Math. 2, Math. 3, and Math. 4.

SRS SRS SRS SRS SC, b SC, b SC, b symb 2 TC TC TC n in Math. 1 may be greater than or equal to 0 and may be less than or equal to M-1. Mmay be the number of subcarriers. Mmay be the length of the SRS sequence. The index l′ of the OFDM symbol may be an index from 0 to N−1. δ in Math. 1 may be log(K). The number of combs Kmay be any value of 2, 4 or 8. The number of combs Kmay be determined by a higher layer parameter. For example, the higher layer parameter may be transmissionComb.

ZC SC, b SRS u in Math. 1, Math. 2, and Math. 3 may be a group number. v in Math. 1, Math. 2, and Math. 3 may be a base sequence number in one group. The group number may be an integer from 0 to 29. One group number may correspond to one group. One base sequence number may correspond to one base sequence. q in Math. 4 may be determined based on at least the group number u and the base sequence number v. Nmay be the largest prime number less than a certain value. For example, the certain value may be M.

The cyclic shift αi may be a cyclic shift for antenna port pi. For example, the antenna port pi and the cyclic shift αi may be determined for each i. The cyclic shift αi may be determined according to Math. 5.

SRS SRS SRS SRS ID fac symb fac symb ap s symb α′ may be the initial cyclic shift value. In a case that cyclic shift hopping is not applied, α′ may be 0. For example, the initial cyclic shift value may be configured by a higher layer parameter. The initial cyclic shift value may be determined by n. For example, the initial cyclic shift value may be determined by the DCI format. The initial cyclic shift value may be 2πR/N. For example, in a case that cyclic shift hopping is applied, the initial cyclic shift value may be determined based on one or both of Rand N. In the case that Sis used, the initial cyclic shift value may be determined based on one or both of Rand N.

fac symb fac SRS The index l″ may be l′. l″ may be floor(l′/R). The l″ may be {0, 1, . . . , N/R−1}. That is, l″ may be an index for the time domain.

CS, max CS, max CS, max CS, max CS, i CS, i CS, i SRS SRS T TC SRS TC SRS TC SRS SRS SRS ap ap SRS ap ap The maximum number (maximum value) of cyclic shifts nmay be determined based on the number of combs KC. For example, in a case that Kis 2, nmay be 8. For example, in a case that Kis 4, nmay be 12. For example, in a case that Kis 8, nmay be 6. nmay be determined according to any one of Math. 6, Math. 7, and Math. 8. For example, nmay be determined according to any one of Math. 6, Math. 7, and Math. 8 independently of the value of S. In a case that Sis greater than or equal to 2, nmay be determined according to any one of Math. 6 and Math. 8. In this case, pi in Math. 6 and Math. 8 may be determined based on the OFDM symbol index, and Nin Math. 6 and Math. 8 may be determined based on S.

CS, i SRS CS, max SRS CS, max SRS CS, max CS, i SRS SRS CS, max SRS CS, max CS, i CS, i CS,i CS,i SRS ap SRS ap SRS ap SRS SRS ap ap SRS ap SRS SRS SRS SRS SRS For example, in a case that condition 1 is satisfied, nmay be determined according to Math. 6. For example, condition 1 may be that the number of antenna ports Nis 4 and the maximum number of cyclic shifts nis 6. Condition 1 may be that the number of antenna ports Nis 8 and the maximum number of cyclic shifts nis 12. Condition 1 may be that the number of antenna ports Nis 8 and the maximum number of cyclic shifts nis 8. For example, in a case that condition 2 is satisfied, nmay be determined according to Math. 7. Condition 2 may be that the number of antenna ports Nis 8. Condition 2 may be that the number of antenna ports Nis 8 and the maximum number of cyclic shifts nis 6. Condition 2 may be that the number of antenna ports Nis 8 and the maximum number of cyclic shifts nis 12. For example, in a case that condition 1 is satisfied and condition 2 is satisfied, nmay be determined according to Math. 6. In the case that condition 1 is satisfied and condition 2 is satisfied, nmay be determined according to Math. 7. In a case that condition 1 is not satisfied and condition 2 is not satisfied, nmay be determined according to Math. 8. Condition 2 may be omitted. For example, nmay be determined according to one of Math. 6 and Math. 8.

CS CS CS, max CS CS CS,i SRS SRS SRS SRS SRS SRS nmay be referred to as an initial cyclic shift value. nmay be an integer from 0 to n−1. nmay be determined by a higher layer parameter. The higher layer parameter may be transmissionComb. nmay be determined based on the higher layer parameter transmissionComb and whether cyclic shift hopping is applied. The initial cyclic shift value is a value that does not depend on the antenna port and may be a value for determining the cyclic shift αi or n.

SRS CS, max SRS CS, max symb fac SRS ap symb fac SRS The initial cyclic shift value may be determined based at least on some or all of the higher layer parameter transmissionComb, the number of continuous OFDM symbols N, the number of repetitions R, the maximum number of cyclic shifts n, and the number of TDMs S. Whether to apply cyclic shift hopping may be configured by a higher layer parameter. In a case that cyclic shift hopping is not applied, the initial cyclic shift value may be determined based on the higher layer parameter transmissionComb. In a case that cyclic shift hopping is applied, the initial cyclic shift value may be determined based at least on some or all of the higher layer parameter transmissionComb, the number of continuous OFDM symbols N, the number of repetitions R, and the maximum number of cyclic shifts n.

SRS CS, max SRS CS, max CS′ CS CS′ symb fac SRS symb fac SRS SRS The initial cyclic shift value may be determined based at least on some or all of the number of continuous OFDM symbols N, the number of repetitions R, and the maximum number of cyclic shifts n. For example, in a case that cyclic shift hopping is not applied, the initial cyclic shift value may be 0. In a case that cyclic shift hopping is applied, the initial cyclic shift value may be determined based at least on some or all of the number of continuous OFDM symbols N, the number of repetitions R, and the maximum number of cyclic shifts n. For example, the initial cyclic shift value may be increased by nfor each symbol index l″. nmay be the sum of nl″ and a value provided by the higher layer parameter transmissionComb.

CS SRS The initial cyclic shift value may be determined based at least on the DCI format. For example, in a case that cyclic shift hopping is not applied, the initial cyclic shift value may be 0. In a case that cyclic shift hopping is applied, the initial cyclic shift value may be determined based at least on the DCI format. For example, nmay be the sum of the initial cyclic shift value and a value provided by the higher layer parameter transmissionComb.

fac fac One or both of the cyclic shift αi and the initial cyclic shift value may be determined, updated, or changed for every first number of OFDM symbols. The first number of OFDM symbols may be one symbol. The first number of OFDM symbols may be the number of repetitions R. The first number of OFDM symbols may be determined by the DCI format. For example, one or both of the cyclic shift αi and the initial cyclic shift value may be functions of the index l′ of the OFDM symbol. For example, the cyclic shift (the value of the cyclic shift) may be determined based at least on l″=floor(l′/R).

SRS ID The sequence number u may be determined based at least on the index l′ of the OFDM symbol. The sequence number u may be determined based on at least nwhich is a sequence ID (SRS sequence ID). For example, the sequence group may be changed (hopped) according to the index l′ of the OFDM symbol. The index l′ of the OFDM symbol may correspond to the antenna port pi. For example, an index of an OFDM symbol may be determined according to an index i.

SRS symb fac fac fac The sequence ID may be determined based at least on one or both of the number of continuous OFDM symbols Nand the number of repetitions R. The sequence ID may be changed for every Rsymbols, where Ris the number of repetitions.

(pi) (pi) (pi) (pi) The SRS may be transmitted in the SRS resource. In a case that the SRS is transmitted in the SRS resource, an SRS sequence r(n, l′) corresponding to each OFDM symbol l′ or each antenna port of the SRS resource may be multiplexed. For example, the start of the SRS sequence r(0, 1′) may be mapped to a resource element(k, 1) in a certain slot for each antenna port pi. For example, based at least on the antenna port pi, the start of the SRS sequence r(0, 1′) may be mapped to the resource element(k, 1) in the certain slot or may be mapped to a resource element(k, l+1) in the certain slot. In other words, the SRS sequence may be mapped to a physical resource. The SRS sequence r(k′, l′) may be mapped to the resource element according to Math. 9. Alternatively, 0 may be mapped to the resource element.

SRS SC, b TC SC SRS RB βmay be a scaling factor (Scaling factor or Amplitude scaling factor). The length of the SRS sequence Mmay be determined based on at least the number of combs Kand the number of subcarriers Nincluded in one resource block.

TC 0 TC 0 TC 0 0 0 TC TC (pi) (pi) (pi) (pi) (pi) (pi) (pi) The frequency position Kk′+kof the resource element may differ depending on the antenna port pi. The frequency position Kk′+kmay be one or multiple subcarriers. The frequency position Kk′+kmay be one subcarrier set. For example, kmay be determined based at least on the antenna port pi. kmay be determined based at least on k. kmay be determined according to any one of Math. 10 and Math. 11.

(pi) SRS CS, max SRS CS CS, max CS, max (pi) bar bar TC ap SRS ap SRS SRS SRS TC TC TC 1001 1003 1001 1003 For example, in a case that condition 3 is satisfied, kmay be determined according to Math. 10. For example, condition 3 may be that the number of antenna ports Nis 4, the maximum number of cyclic shifts nis 6, and the antenna port pi is either of {,}. Condition 3 may be that the number of antenna ports Nis 4, the maximum number of cyclic shifts nis a value from n/2 to n−1, and the antenna port pi is either of {,}. For example, in a case that condition 3 is not satisfied, kmay be k. A comb number offset kmay be determined by a higher layer parameter. The higher layer parameter may be transmissionComb.

(pi) SRS CS, max CS, max SRS CS, max TC ap SRS SRS ap SRS 1001 1003 1005 1007 1000 1001 1002 1003 1001 1003 1005 1007 For example, in a case that condition 4 is satisfied, kmay be determined according to Math. 11. For example, condition 4 may include at least the number of antenna ports Nbeing 8. For example, condition 4 may include at least the antenna port pi being any one of {,,,}. For example, condition 4 may include at least the antenna port pi being any one of {,,,}. Condition 4 may include nbeing 6. Condition 4 may include nbeing 12. For example, condition 4 may be that the number of antenna ports Nis 8, that nis 6, and that the antenna port pi is any one of {,,,}.

Uplink power control may determine power (transmission power) for the PUSCH, the PUCCH, the SRS, and the PRACH. The terminal apparatus may include a transmission power control unit.

μ SRS s, f 0 offset symb ap A transmission occasion i for the PUSCH, the PUCCH, the SRS, and the PRACH may be determined based on some or all of a slot index, a radio frame number (system frame number: SFN), the first symbol, and the number of continuous symbols. The slot index may be n. The first symbol S for the SRS may be l. The first symbol for the SRS may be determined based at least on l. The number of continuous symbols L for the SRS may be N. The number of continuous symbols L for the SRS may be determined based on S.

ap ap SRS, b, f, c s SRS, b, f, c s ap ap SRS, b, f, c s SRS, b, f, c s ap ap ap SRS, b, f, c s SRS, b, f, c s ap 1 1 1 Hat1 SRS Hat2 SRS Hat2 SRS In a case that Sis 1 or Sis not configured, the terminal apparatusmay equally split a linear value P(i, q, l) of a transmission power P(i, q, l) across Nantenna ports (SRS ports). In a case that Sis greater than or equal to 2, the terminal apparatusmay equally split a linear value P(i, q, l) of the transmission power P(i, q, l) across N/Santenna ports (SRS ports). In the case that Sis greater than or equal to 2, the terminal apparatusmay equally split the linear value P(i, q, l) of the transmission power P(i, q, l) across the antenna ports (SRS ports) configured for one OFDM symbol. Nantenna ports may be the antenna ports configured for the SRS.

1 SRS, b, f, c s SRS, b, f, c s SRS, b, f, c s SRS, b, f, c s ap SRS, b, f, c s SRS, b, f, c s ap ap SRS The terminal apparatusmay determine the transmission power P(i, q, l). The transmission power P(i, q, l) may be a transmission power for the SRS. The transmission power P(i, q, l) may be a transmission power for the SRS resource. The transmission power P(i, q, l) may be a transmission power for Nantenna ports. The transmission power P(i, q, l) in the transmission occasion i may be determined according to Math. 12. P(i, q, l) may be constant within SOFDM symbols. For example, one or both of power consistency and phase continuity may be maintained within SOFDM symbols.

1 1 1 1 1 ap s b may be an index for identifying the active BWP or the active uplink BWP among one or multiple BWPs. f may be an index for identifying one carrier among one or multiple carriers. c may be an index for identifying one serving cell among one or multiple serving cells. In Math. 12, b may be the active UL BWP of the carrier f of the serving cell c. The terminal apparatusmay transmit the SRS in the active UL BWP b. l may be a power control state (power control state, closed loop index). l may be an index for a power control adjustment state. l may be a value for identifying the power control adjustment state. The terminal apparatusmay maintain two power control states. For example, the terminal apparatusmay maintain the power control states of 1=0 and 1=1. For example, in a case that 1 is 0, the terminal apparatusmay maintain one power control state. For example, in a case that 1 is 1, the terminal apparatusmay maintain two power control states. For example, 1 may be constant within SOFDM symbols. qmay be an index for identifying one SRS resource set among one or multiple SRS resource sets.

CMAX, f, c CMAX, f,c ap ap CMAX, f, c SRS P(i) may be a maximum output power to be configured. In Means 1, P(i) may be configured regardless of the value of S. For example, in the case that Nis 8, P(i) may be determined for 8 SRS ports.

ap CMAX, f, c ap ap ap ap CMAX, f, c ap ap CMAX, f, c ap ap CMAX, f, c SRS SRS SRS SRS In Means 2, in the case that Sis greater than or equal to 2, P(i) may be determined for N/SSRS ports. For example, in the case that Sis greater than or equal to 2 and Nis 8, P(i) may be determined for N/SSRS ports. In Means 2, P(i) may be a maximum output power configured for one OFDM symbol. For example, N/SSRS ports may correspond to the same antenna port group. For example, P(i) may be a minimum value among multiple maximum output powers. For example, each of the multiple maximum output powers may be determined for one antenna port group.

O-SRS, b, f, c s SRS, b, f, c SRS, b, f, c SRS, b, f, c ap SRS, b, f, c s b, f, c d b, f, c d d b, f, c d d b, f, c d d ap b, f, c b, f, c ap P(q) may be determined by a higher layer parameter. The higher layer parameter may be p0. M(i) may be an SRS bandwidth. M(i) may be the number of resource blocks. M(i) may be constant within SOFDM symbols. α(q) may be provided by a higher layer parameter alpha. PL(q) may be a DL path loss estimate (estimated value). PL(q) may be expressed in dB. qmay be an index of a reference signal (RS) resource. PL(q) may be calculated using the RS resource index q. PL(q) or qmay be constant within SOFDM symbols. h(i, l) may be determined based at least on a TPC command. h(i, l) may be constant within SOFDM symbols.

ap ap In the SOFDM symbols (adjacent OFDM symbols), the SRS need not be transmitted on multiple uplink carriers. In the SOFDM symbols (adjacent OFDM symbols), the SRS need not be transmitted on multiple uplink carriers.

1 1 1 1 SRS Hat2 Tilde Tilde ap ap ap SRS, b, f, c s CMAX, f, c CMAX, f, c ap A power headroom report (PHR) may be provided. There may be three types of PHR. The terminal apparatusmay determine the PHR. Type 3 PHR may be valid for the SRS transmission occasion i. The terminal apparatusmay determine that the PHR is based on actual SRS transmission. The actual SRS transmission may be SRS transmission for N/SSRS ports. The actual SRS transmission may be determined by Stransmission powers P(i, q, l). The terminal apparatusmay calculate Type 3 PHR. For example, the terminal apparatusmay calculate Type 3 PHR based at least on P(i). P(i) may be determined independently of S.

9 FIG. 900 910 1 900 1 900 900 1 900 1 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 is a diagram illustrating an example of TMD-based mapping for an SRS according to an aspect of the present embodiment. An SRS resourcemay be determined in a slot. The terminal apparatusmay transmit the SRS resource. The terminal apparatusmay transmit an SRS corresponding to the SRS resource. The SRS may be transmitted in the SRS resourceto the terminal apparatus. An SRS resource set corresponding to the SRS resourcemay be transmitted to the terminal apparatus. The SRS resourcemay be associated with an aperiodic SRS. The SRS resourcemay be associated with a periodic SRS. The SRS resourcemay be associated with a semi-persistent SRS. In other words, resourceType of the SRS resource set including the SRS resourcemay be set to ‘aperiodic’, ‘semi-persistent’, or ‘periodic’. The SRS resourcesto which one or multiple SRS sequences are mapped may be transmitted. The SRS resourceto which one or multiple SRSs are mapped may be transmitted. The SRS resourcemay be indicated by an SRS resource indicator (SRI) field in the DCI. The SRS resourcemay be identified by the SRI. The SRS resourcemay be indicated by a higher layer parameter. For example, the higher layer parameter may be srs-ResourceIndicator or srs-ResourceIndicator2. usage of the SRS resource set associated with the SRS resourcemay be ‘codebook’. usage of the SRS resource set associated with the SRS resourcemay be ‘nonCodebook’. The SRS resourcemay include one, two, four, or eight ports. For example, the SRS ports in the SRS resourcemay be indexed as pi=1000+i. The SRS resource (resource)may be one of K SRS resources included in one SRS resource set. One or multiple SRS parameters for the SRS resourcemay be configured. For example, one or multiple SRS parameters may be configured by SRS-Resource or SRS-PorResource corresponding to the SRS resource. The SRS resourcemay be a target SRS resource. The SRS resourcemay be configured by a higher layer parameter. For example, the SRS resourcemay be configured in one serving cell and/or one uplink BWP. The SRS resourcemay include one spatial domain filter.

900 900 900 9 FIG. 9 FIG. The SRS may be transmitted in the SRS resource. The SRS sequence may be mapped to resource elements. For example, in a case that the SRS is transmitted in the SRS resource, the sequence (SRS sequence) corresponding to each OFDM symbol and each antenna port may be mapped to the resource elements (physical resource). The SRS resourcemay be used for SRS transmission. The horizontal axis inmay be an OFDM symbol index l. The vertical axis inmay be a subcarrier index k.

SRS symb 900 900 920 921 922 923 900 920 921 922 923 920 921 922 923 The number of continuous OFDM symbols Nfor the SRS resourcemay be 4. The SRS resourcemay include at least an OFDM symbol, an OFDM symbol, an OFDM symbol, and an OFDM symbol. The SRS resourcemay occupy at least the OFDM symbol, the OFDM symbol, the OFDM symbol, and the OFDM symbol. The OFDM symbol, the OFDM symbol, the OFDM symbol, and the OFDM symbolmay be adjacent OFDM symbols.

SRS ap ap ap ap 900 900 900 9 FIG. The number of antenna ports (the number of SRS ports) Nfor the SRS resourcemay be 8. In, the number of OFDM symbols Smay be 2. Smay be determined for the SRS resource. Smay be determined for the SRS resource set including the SRS resource.

900 1000 1001 1002 1003 1004 1005 1006 1007 920 922 921 923 1000 1001 1002 1003 1004 1005 1006 1007 1000 1001 1004 1005 1002 1003 1006 1007 ap ap ap ap ap ap ap 9 FIG. The SRS resourcemay include the SRS ports {,,,,,,,}. SSRS port sets may be determined. For example, in the case that Sis 2, a first SRS port set and a second SRS port set may be determined. For example, in the case that Sis 4, the first SRS port set, the second SRS port set, a third SRS port set, and a fourth SRS port set may be determined. In, Smay not be expected to be 4. For example, frequency hopping may not be expected to be performed within SOFDM symbols. In the case that Sis 2, the first SRS port set may be mapped to the OFDM symboland the OFDM symbol. In the case that Sis 2, the second SRS port set may be mapped to the OFDM symboland the OFDM symbol. The first SRS port set may include the SRS ports {,,,}. The second SRS port set may include the SRS ports {,,,}. The first SRS port set may include the SRS ports {,,,}. The second SRS port set may include the SRS ports {,,,}.

fac s s fac ap s symb s 900 9 FIG. SRS In Means A, the number of repetitions (repetition factor) Rfor the SRS resourcemay be 1. In Means A, Rmay be 2 in. R=R·Smay be applied. In Means A, frequency hopping (or comb offset hopping) may be performed for every Rsymbols. mod(N, R) may be 0.

fac fac fac ap 900 In Means B, the number of repetitions (repetition factor) Rfor the SRS resourcemay be 2. In Means B, frequency hopping (or comb offset hopping) may be performed for every Rsymbols. However, mod(R, S) may be 0.

900 SRS SRS SC, b SC, b 9 FIG. 9 FIG. The number of subcarriers for the SRS resourcemay be M. In, Mmay be 4. In, the length of the SRS sequence may be 4.

900 900 For example, up to eight SRS sequences may be mapped to the SRS resource. For example, up to eight SRS sequences may be multiplexed in the SRS resource.

900 For example, some or all of the following may be mapped to the SRS resource: a first SRS sequence, a second SRS sequence, a third SRS sequence, a fourth SRS sequence, a fifth SRS sequence, a sixth SRS sequence, a seventh SRS sequence, and an eighth SRS sequence. The first SRS sequence may be determined based at least on the first antenna port. The second SRS sequence may be determined based at least on the second antenna port. The third SRS sequence may be determined based at least on the third antenna port. The fourth SRS sequence may be determined based at least on the fourth antenna port. The fifth SRS sequence may be determined based at least on the fifth antenna port. The sixth SRS sequence may be determined based at least on the sixth antenna port. The seventh SRS sequence may be determined based at least on the seventh antenna port. The eighth SRS sequence may be determined based at least on the eighth antenna port.

1000 1001 1002 1003 1004 1005 1006 1007 1000 1002 1004 1006 1001 For example, the first antenna port may be. For example, the second antenna port may be. For example, the third antenna port may be. For example, the fourth antenna port may be. For example, the fifth antenna port may be. For example, the sixth antenna port may be. For example, the seventh antenna port may be. For example, the eighth antenna port may be. For example, the first antenna port may be. For example, the second antenna port may be. For example, the third antenna port may be. For example, the fourth antenna port may be. For example, the fifth antenna port may be.

1003 1005 1007 For example, the sixth antenna port may be. For example, the seventh antenna port may be. For example, the eighth antenna port may be.

ap ap ap ap The first SRS sequence may be determined based at least on a 1_1st cyclic shift or a 1_2nd cyclic shift. The second SRS sequence may be determined based at least on a 2_1st cyclic shift or a 2_2nd cyclic shift. The third SRS sequence may be determined based at least on a 3_1st cyclic shift or a 3_2nd cyclic shift. The fourth SRS sequence may be determined based at least on a 4_1st cyclic shift or a 4_2nd cyclic shift. The fifth SRS sequence may be determined based at least on a 5_1st cyclic shift or a 5_2nd cyclic shift. The sixth SRS sequence may be determined based at least on a 6_1st cyclic shift or a 6_2nd cyclic shift. The seventh SRS sequence may be determined based at least on a 7_1st cyclic shift or a 7_2nd cyclic shift. The eighth SRS sequence may be determined based at least on an 8_1st cyclic shift or an 8_2nd cyclic shift. In the case the Sis 2, the first SRS sequence and the fifth SRS sequence may be determined based on the same cyclic shift. In the case the Sis 2, the second SRS sequence and the sixth SRS sequence may be determined based on the same cyclic shift. In the case the Sis 2, the third SRS sequence and the seventh SRS sequence may be determined based on the same cyclic shift. In the case the Sis 2, the fourth SRS sequence and the eighth SRS sequence may be determined based on the same cyclic shift.

920 921 920 921 The first SRS sequence may be determined based at least on the 1_1st cyclic shift in the OFDM symbols included in the OFDM symbol set. The first SRS sequence may be determined based at least on the 1_2nd cyclic shift in the OFDM symbols included in the OFDM symbol set. An nth SRS sequence may be determined based at least on an n_1st cyclic shift in the OFDM symbols included in the OFDM symbol set. The nth SRS sequence may be determined based at least on an n_2nd cyclic shift in the OFDM symbols included in the OFDM symbol set.

As a problem, the SRS may be used to measure channel quality, but port mapping and power control for 8 SRS ports need to be performed appropriately. Means A, Means B, Means 1, and Means 2 may be used for solving the problem.

1 1 1 1 The terminal apparatusmay include a generator. For example, the generator may generate a baseband signal. The generator may generate an SRS sequence (SRS signal, SRS). A transmitter in the terminal apparatusmay transmit the SRS. That is, the transmitter in the terminal apparatusmay transmit the SRS resource. The fact that the SRS is transmitted may mean that the SRS resource is transmitted. The terminal apparatusmay transmit the SRS in the SRS resource.

SRS symb The SRS sequence may be mapped to the SRS resource. The SRS resource may include at least a first number of OFDM symbols. For example, the first number of OFDM symbols may be N.

1 SRS SRS ap symb The terminal apparatusmay include a receiver that receives a PDCCH. The DCI may be mapped to the PDCCH. The DCI may indicate the SRS resource. For example, the DCI may indicate the SRS resource in the SRI field. The number of SRS ports Nfor the SRS resource may be any of 1, 2, 4 and 8. The SRS resource may include NOFDM symbols.

ap ap ap ap In a case that the number of SRS ports is 8, the 8 SRS ports may be mapped to SOFDM symbols. In the case that the number of SRS ports is 8, the 8 SRS ports may be mapped across SOFDM symbols. Smay be determined by a higher layer parameter for the SRS resource set. In a case that the number of SRS ports configured for the SRS resource is not 8, the higher layer parameter for determining Smay be ignored.

fac The number of repetitions Rmay be configured for the SRS resource.

s s fac ap s In Means A, frequency hopping may be performed for every ROFDM symbols. Rmay be expressed by the product of Rand S. Some or all of sequence hopping, cyclic shift hopping, and comb offset hopping may be performed for every ROFDM symbols.

fac fac ap ap In Means A, each of the multiple (for example, 8) SRS ports may be mapped to a first subcarrier set in a first OFDM symbol set. Each of the multiple (for example, 8) SRS ports may be mapped to a second subcarrier set in a second OFDM symbol set. For example, the multiple SRS ports mapped to the first subcarrier set may be repeatedly mapped in the first OFDM symbol set Rtimes. For example, the multiple SRS ports mapped to the second subcarrier set may be repeatedly mapped in the second OFDM symbol set Rtimes. For example, the multiple SRS ports mapped to the first subcarrier set may be mapped across SOFDM symbols in the first OFDM symbol set. For example, the multiple SRS ports mapped to the second subcarrier set may be mapped across SOFDM symbols in the second OFDM symbol set.

s s symb symb s SRS SRS In Means A, the number of OFDM symbols constituting each of the first OFDM symbol set and the second OFDM symbol set may be R. Each of the first OFDM symbol set and the second OFDM symbol set may include ROFDM symbols. NOFDM symbols may include the first OFDM symbol set and the second OFDM symbol set. In this case, N/Rmay be 2.

s symb symb s SRS SRS In Means A, Rmay not be expected to exceed N. mod(N, R) may be 0.

fac fac In Means B, frequency hopping may be performed for every ROFDM symbols. Some or all of sequence hopping, cyclic shift hopping, and comb offset hopping may be performed for every ROFDM symbols.

fac ap fac ap ap ap In Means B, each of the multiple (for example, 8) SRS ports may be mapped to the first subcarrier set in the first OFDM symbol set. Each of the multiple (for example, 8) SRS ports may be mapped to the second subcarrier set in the second OFDM symbol set. For example, the multiple SRS ports mapped to the first subcarrier set may be repeatedly mapped in the first OFDM symbol set R/Stimes. For example, the multiple SRS ports mapped to the second subcarrier set may be repeatedly mapped in the second OFDM symbol set R/Stimes. For example, the multiple SRS ports mapped to the first subcarrier set may be mapped across SOFDM symbols in the first OFDM symbol set. For example, the multiple SRS ports mapped to the second subcarrier set may be mapped across SOFDM symbols in the second OFDM symbol set.

fac fac symb symb fac SRS SRS In Means B, the number of OFDM symbols constituting each of the first OFDM symbol set and the second OFDM symbol set may be R. Each of the first OFDM symbol set and the second OFDM symbol set may include ROFDM symbols. NOFDM symbols may include the first OFDM symbol set and the second OFDM symbol set. In this case, N/Rmay be 2.

fac symb fac ap symb fac SRS SRS In Means A, Rneed not be expected to exceed N. mod(R, S) may be 0. mod(N, R) may be 0.

ap In the case that Sis greater than or equal to 2, cyclic shift hopping and comb offset hopping need not be expected to be performed.

SRS, b, f, c s SRS, b, f, c s 1 The transmission power may be determined for the SRS resource. The transmission power for the SRS may be determined. The transmission power may be P(i, q, l). The terminal apparatusmay determine or calculate P(i, q, l).

SRS SRS ap ap In Means 1, the transmission power may be determined or calculated for NSRS ports. The transmission power may be determined or calculated based at least on NSRS ports.

SRS SRS SRS SRS SRS ap ap ap ap SRS, b, f, c s ap ap ap ap ap ap In Means 1, the transmission power may be equally split for N/SSRS ports. The linear value of the transmission power may be equally split for N/SSRS ports. The linear value of the transmission power may be P(i, q, l)/√N/S. N/Smay be a square root of N/S.

CMAX, f, c ap SRS, b, f, c s ap SRS SRS In Means 1, the maximum value P(i) of the transmission power may be determined for the NSRS ports. For example, one or both of the maximum value of the transmission power and the transmission power P(i, q, l) may be determined for the SRS resource including NSRS ports or the SRS resource set.

SRS SRS SRS SRS SRS ap ap ap ap ap ap In Means 1, the transmission power may be calculated in consideration of NSRS ports. In the case that Nis 8, the transmission power or the linear value of the transmission power may be evenly split for the N/SSRS ports. The transmission power or the linear value of the transmission power may be evenly split for the SRS ports configured in one OFDM symbol. In the case that Nis not 8, the transmission power or the linear value of the transmission power may be equally split for NSRS ports (configured antenna ports).

SRS SRS ap ap ap ap In Means 2, the transmission power may be determined or calculated for N/SSRS ports. The transmission power may be determined or calculated based at least on N/SSRS ports.

SRS SRS SRS SRS SRS ap ap ap ap SRS, b, f, c s ap ap ap ap ap ap In Means 2, the transmission power may be equally split for N/SSRS ports. The linear value of the transmission power may be equally split for N/SSRS ports. The linear value of the transmission power may be P(i, q, l)/√N/S. √N/Smay be a square root of N/S.

CMAX, f, c ap ap SRS, b, f, c s ap ap ap SRS SRS SRS In Means 2, the maximum value P(i) of the transmission power may be determined for N/SSRS ports. For example, one or both of the maximum value of the transmission power and the transmission power P(i, q, l) may be determined for the SRS resource including NSRS ports or the SRS resource set in consideration of N/SSRS ports.

SRS SRS SRS SRS SRS SRS SRS ap ap ap ap ap ap ap ap ap ap ap In Means 2, the transmission power may be calculated in consideration of N/SSRS ports. In the case that Nis 8, the transmission power or the linear value of the transmission power may be evenly split for the N/SSRS ports. The transmission power or the linear value of the transmission power may be evenly split for the SRS ports configured in one OFDM symbol. In the case that Nis not 8, the transmission power or the linear value of the transmission power may be equally split for NSRS ports (configured antenna ports). The maximum value of the transmission power may be the smallest maximum output power among the maximum output powers determined for the N/SSRS ports. The maximum value of the transmission power may be the minimum value of the multiple maximum output powers determined for N/SSRS ports. The maximum value of the transmission power may be referred to as the maximum output power.

SRS SRS SRS SRS SRS ap ap ap ap ap ap ap ap The maximum output power may be determined based on Nand S. For example, in the case that Nis 8, a first maximum output power may be used. For example, in the case that Nis not 8, a second maximum output power may be used. For example, in the case that Nis 8 and Sis greater than or equal to 2 (i.e., in a case that the TDM-based mapping is applied), the first maximum output power may be used. For example, in a case that Nis 8 and Sis 1 (i.e., in a case that the TDM-based mapping is not applied), the second maximum output power may be used.

Various aspects of apparatuses according to an aspect of the present embodiment will be described below.

3 1 Each of programs running on the base station apparatusand the terminal apparatusaccording to the present invention may be a program that controls a central processing unit (CPU) and the like (a program causing a computer to function) to realize the functions of the above-described embodiment according to the present invention. The information handled in these apparatuses is temporarily loaded into a Random Access Memory (RAM) while being processed, is then stored in a Hard Disk Drive (HDD) and various types of Read Only Memory (ROM) such as a Flash ROM, and is read, modified, and written by the CPU, as necessary.

1 3 Note that the terminal apparatusand the base station apparatusaccording to the above-described embodiment may be partially implemented by a computer. In that case, this configuration may be implemented by recording a program for implementing such control functions on a computer-readable recording medium and causing a computer system to read the program recorded on the recording medium for execution.

1 3 Note that it is assumed that the “computer system” mentioned here refers to a computer system built into the terminal apparatusor the base station apparatus, and the computer system includes an OS and hardware components such as peripheral devices. In addition, the “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage apparatus such as a hard disk built into the computer system.

Moreover, the “computer-readable recording medium” may include a medium that dynamically stores a program for a short period of time, such as a communication line in a case that the program is transmitted over a network such as the Internet or over a communication line such as a telephone line, and may also include a medium that stores the program for a certain period of time, such as a volatile memory included in the computer system functioning as a server or a client in such a case. In addition, the above-described program may be one for implementing some of the above-described functions, and also may be one capable of implementing the above-described functions in combination with a program already recorded in a computer system.

3 3 3 1 Furthermore, the base station apparatusaccording to the aforementioned embodiment may be implemented as an aggregation (apparatus group) including multiple apparatuses. Each of the apparatuses included in such an apparatus group may include a part or all of each function or each functional block of the base station apparatusaccording to the aforementioned embodiment. As the apparatus group, it is only necessary to have all of functions or functional blocks of the base station apparatus. Moreover, the terminal apparatusaccording to the aforementioned embodiment can also communicate with the base station apparatus as the aggregation.

3 3 Also, the base station apparatusaccording to the aforementioned embodiment may be an Evolved Universal Terrestrial Radio Access Network (EUTRAN) and/or a NextGen RAN (NG-RAN or NR RAN). Moreover, the base station apparatusaccording to the aforementioned embodiment may have a part or all of the functions of a higher node for an eNodeB and/or a gNB.

1 3 1 3 Also, a part or all portions of each of the terminal apparatusand the base station apparatusaccording to the aforementioned embodiment may be implemented as an LSI, which is typically an integrated circuit, or may be implemented as a chip set. The functional blocks of each of the terminal apparatusand the base station apparatusmay be individually implemented as a chip, or a part or all of the functional blocks may be integrated into a chip.

Furthermore, a circuit integration technique is not limited to the LSI and may be implemented with a dedicated circuit or a general-purpose processor. Moreover, in a case that a circuit integration technology that substitutes an LSI appears with the advance of the semiconductor technology, it is also possible to use an integrated circuit based on the technology.

In addition, although the aforementioned embodiments have described the terminal apparatus as an example of a communication apparatus, the present invention is not limited to such a terminal apparatus, and is also applicable to a terminal apparatus or a communication apparatus that is a stationary type or a non-movable type electronic apparatus installed indoors or outdoors, for example, such as an AV device, a kitchen device, a cleaning or washing machine, an air-conditioning device, office equipment, a vending machine, and other household appliances.

Although the embodiments of the present invention have been described in detail above referring to the drawings, the specific configuration is not limited to the embodiments and includes, for example, design changes within the scope that do not depart from the gist of the present invention. Furthermore, in the present invention, various modifications are possible within the scope of the claims, and embodiments that are made by suitably combining technical means disclosed according to the different embodiments are also included in the technical scope of the present invention. A configuration in which elements described in the respective embodiments and having mutually similar effects are substituted for one another is also included.

The present invention can be utilized, for example, in a communication system, communication equipment (for example, a cellular phone apparatus, a base station apparatus, a wireless LAN apparatus, or a sensor device), an integrated circuit (for example, a communication chip), or a program.

1 1 1 1 (A,B,C) Terminal apparatus 3 Base station apparatus 10 30 ,Radio transmission and/or reception unit 10 30 a a ,Radio transmission unit 10 30 b b ,Radio reception unit 11 31 ,Antenna unit 12 32 ,RF unit 13 33 ,Baseband unit 14 34 ,Higher layer processing unit 15 35 ,Medium access control layer processing unit 16 36 ,Radio resource control layer processing unit 91 92 93 94 ,,,Search space set 300 Component carrier 301 Primary cell 302 303 ,Secondary cell 700 Set of resource elements for PSS 710 711 712 713 ,,,Set of resource elements for PBCH and DMRS for PBCH 720 Set of resource elements for SSS 3000 Point 3001 3002 ,Resource grid 3003 3004 ,BWP 3011 3012 3013 3014 ,,,Offset 3100 3200 ,Common resource block set 900 SRS resource 910 Slot 920 921 922 923 ,,,OFDM symbols